Dec. 2023, 日本機械学会 計算力学部門, 優秀講演表彰
40305547

Jun. 2023, Outstanding Reviewer Award in Acta Materialia and Scripta Materialia　　　　　　　　　　　　　　　

Apr. 2022, 文部科学大臣表彰 科学技術賞（研究部門）　　　　　　　　　　　　　　　

Mar. 2022, 日本鉄鋼協会, 西山記念賞　　　　　　　　　　　　　　　

2019, 日本学術振興会・製鋼第19委員会, 優秀研究賞　　　　　　　　　　　　　　　
大野 宗一

2019, 革新的ハイパフォーマンス・コンピューティング・インフラ(HPCI), 令和元年度HPCIシステム利用研究課題優秀成果賞　　　　　　　　　　　　　　　
髙木知弘,青木 尊之,大野宗一,澁田靖,下川辺隆史,坂根慎治,三好英輔,佐藤遼太郎,岡ゆきみ,金根佑

2017, 10th Pacific Rim International Conference on Modeling of Casting and Solidification Processes, BEST POSTER PRESENTATION AWARD　　　　　　　　　　　　　　　
S. Sakane;T. Takaki;M. Ohno;Y. Shibuta;T. Shimokawabe;T. Aoki

2016, （一社）日本計算工学会, 第21回計算工学講演会グラフィクスアワード特別賞（ビジュアルコンピューティング賞）　　　　　　　　　　　　　　　
坂根慎治,髙木知弘,大野宗一,澁田靖,下川辺隆史,青木尊之

2016, 日本学術振興会, 科研費審査員・表彰　　　　　　　　　　　　　　　
大野 宗一

2015, Modeling of Casting, Welding and Advanced Solidification Processes XIV, Best Poster Award　　　　　　　　　　　　　　　
S. Sakane, T. Takaki, M. Ohno, T. Shimokawabe and T. Aoki

2015, 本多記念会, 第36回 本多記念研究奨励賞　　　　　　　　　　　　　　　
大野 宗一

2010, FGM 研究奨励賞　　　　　　　　　　　　　　　
Japan

2010, 日本鉄鋼協会, 研究奨励賞　　　　　　　　　　　　　　　
Japan

2010, 第22回 計算力学講演会 優秀講演表彰　　　　　　　　　　　　　　　
Japan

2008, 第18回 日本金属学会奨励賞（組織部門）　　　　　　　　　　　　　　　
Japan

2007, 第55回 日本金属学会論文賞(組織部門)受賞　　　　　　　　　　　　　　　
Japan

2002, MRS Fall Meeting Symposium BB 優秀ポスター賞　　　　　　　　　　　　　　　

2001, 日本金属学会・鉄鋼協会北海道支部会奨励賞受賞　　　　　　　　　　　　　　　
Japan

Molecular dynamics simulation of solute trapping and drag in rapidly solidified Al-Cu alloys
Keita Konishi, Yasushi Shibuta, Munekazu Ohno
Computational Materials Science, 251, 113763, 113763, Elsevier BV, Mar. 2025, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal

Molecular dynamics simulation of excess vacancy formation during rapid solidification of pure metals
Tomoya Yazawa, Yasushi Shibuta, Munekazu Ohno
Computational Materials Science, 247, 113510, 113510, Elsevier BV, Jan. 2025, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal

Twin experiments and detailed investigation of data assimilation system for columnar dendrite growth in thin film
Ayano Yamamura, Shinji Sakane, Munekazu Ohno, Hideyuki Yasuda, Tomohiro Takaki
Acta Materialia, 281, 120356, 120356, Elsevier BV, Dec. 2024, [Peer-reviewed]
English, Scientific journal

Morphological diversity in directionally-solidified microstructures with varying anisotropy of solid-liquid interfacial free energy
Geunwoo Kim, Tomohiro Takaki, Yasushi Shibuta, Hyunseok Ko, Munekazu Ohno
Journal of Materials Research and Technology, 30, 4044, 4052, 01 May 2024, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal

Computing the permeability of tilted columnar dendrites with phase-field and lattice Boltzmann methods
Tomohiro Takaki, Yasumasa Mitsuyama, Shinji Sakane, Munekazu Ohno, Yasushi Shibuta, Takayuki Aoki
International Journal of Thermofluids, May 2024, [Peer-reviewed]
English, Scientific journal

Synthetic first-principles studies from phase equilibria to microstructural formation in the Fe-Pt L10 phase
M. Ohno, Y. Chen, Y. Chinda, T. Mohri
Physical Review B, 107, 174111 (8 pp), May 2023, [Peer-reviewed], [Lead author]
English, Scientific journal

Development of a data assimilation system for the investigation of the dendrite solidification process by integrating in situ X-ray imaging and phase-field simulation
A Yamamura, S Sakane, M Ohno, H Yasuda, T Takaki
IOP Conference Series: Materials Science and Engineering, 1281, 1, 012049, 012049, {IOP} Publishing, 01 May 2023, [Peer-reviewed]
English, Scientific journal, Abstract
The dendrite solidification process has been observed and simulated using state-of-the-art techniques, such as time-resolved X-ray tomography (4D-CT) and high-performance phase-field (PF) simulations. 4D-CT has enabled the direct observation of the 3D dendrite growth in opaque alloys. However, the spatiotemporal resolution is not sufficient for investigating fast phenomena because a 3D solidification structure is obtained using hundreds of transmission images during the 180° rotation of a sample. High-performance PF simulations have enabled the simulation of multiple 3D dendrite growth phenomena. However, the material properties required in PF solutions of alloys are often unavailable. Therefore, integrating in situ X-ray observations with PF simulations using data assimilation is a promising approach for simultaneously solving these issues. In this study, we developed a data assimilation system with an ensemble Kalman filter, in which the solid fraction along the thickness of a sample was used as observation data to enable data assimilation using X-ray transmission images. The performance of the developed data assimilation system was evaluated via twin experiments for columnar dendrite growth during the directional solidification of a binary alloy in a thin film. The results showed that data assimilation using the solid fraction as observation data estimated the material properties and solidification morphologies with reasonable accuracy.

Dependence of Eutectic Fraction on Inclination Angle of Columnar Dendrite Structures in Al-3 mass% Cu Alloy Analyzed by Phasefield Simulation
Ryo Yamada, Jaehoon Lee, Tomohiro Takaki, Yasushi Shibuta, Munekazu Ohno
ISIJ International, 63, 7, 1108, 1113, 2023, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal

Time evolution of interface shape distribution of equiaxed dendrite: A phase-field study
Munekazu Ohno, Mikihiro Kudo, Geunwoo Kim, Ryo Yamada, Yasushi Shibuta, Tomohiro Takaki
IOP Conference Series: Materials Science and Engineering, 1274, 1, 012042, 012042, IOP Publishing, 01 Jan. 2023, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal, Abstract

An understanding of the morphology of growing dendrites in alloys is needed for an analysis of microsegregation, as well as an estimation of the permeability for macroscopic fluid dynamics. Quantitative phase-field simulations were used to study the growth process of three-dimensional (3D) equiaxed dendrites in an Al-1.0 mass%Cu alloy during continuous cooling. The dendrites were analysed using an interface shape distribution (ISD) map, which provides the probability of the local interface having a morphology with a given curvedness (C) and shape factor (S). Morphological changes in the microstructure can be measured sensitively from the change in the average value of the curvedness 〈C〉 relative to the solid volume fraction. The ISD map continued to change over time during continuous cooling, implying that it was not time-invariant. Furthermore, when microstructural changes occurred, similarities between the ISD maps were observed, independent of the cooling rates and system sizes.

High-precision solidification simulation by estimating heat transfer coefficients through data assimilation
Y Natsume, T Oikawa, M Ohno
IOP Conference Series: Materials Science and Engineering, 1274, 1, 012029, 012029, IOP Publishing, 01 Jan. 2023, [Peer-reviewed], [Last author]
Scientific journal, Abstract

Solidification analysis is important for accurately predicting casting processes. A high-precision casting simulation requires accurate data of the physical properties of materials and heat transfer parameters. In particular, the heat transfer coefficient is a major parameter influencing the casting simulation results. Because the heat transfer coefficient is not uniquely determined by the material, it is typically estimated by trial and error, which requires considerable time for accurate estimations. Therefore, we developed a method to quickly estimate the heat transfer coefficient in a casting process by combining data assimilation and solidification simulations. With this method, the time-dependent heat transfer coefficient can be estimated in an appropriate and easy manner. To reproduce the 3D temperature distribution in a casting with high accuracy, we developed a method to estimate multiple heat transfer coefficients simultaneously by combining data assimilation and 3D solidification simulation. Al–5 mass% Si alloy was cast into a sand mold with a casting size of 30 mm × 30 mm × 100 mm, and the temperature was measured at five points in the casting to obtain a cooling curve. Two cooling curves corresponding to locations of 5 mm from the casting wall were used to estimate the two heat transfer coefficients on the side and bottom surfaces, which were simultaneously estimated by data assimilation. The results confirmed that all the five cooling curves could be reproduced with a high accuracy and that high-precision casting simulation was possible.

Preliminary system for data assimilation to infer material parameters from directional solidification experiments: twin experimental study using phase-field method
Y Imai, S Sakane, M Ohno, H Yasuda, T Takaki
IOP Conference Series: Materials Science and Engineering, 1274, 1, 012040, 012040, IOP Publishing, 01 Jan. 2023, [Peer-reviewed]
Scientific journal, Abstract

The integration of phase-field (PF) simulations and in situ observations is a promising approach for understanding dendrite growth. In this study, a preliminary data assimilation system is developed to integrate PF simulations and in situ real-time X-ray radiography during the directional solidification of a binary alloy. In this system, only the region around the tip of a primary arm is used for data assimilation. The validity of the developed system is confirmed through twin experiments for columnar dendrite growth with different inclined angles of preferred growth direction.

Data assimilation for dendritic solidification with melt convection: phase-field lattice Boltzmann study
Ayano Yamamura, Shinji Sakane, Munekazu Ohno, Hideyuki Yasuda, Tomohiro Takaki
IOP Conference Series: Materials Science and Engineering, 1274, 1, 012044, 012044, IOP Publishing, 01 Jan. 2023, [Peer-reviewed]
Scientific journal, Abstract

Time-resolved in-situ X-ray tomography and high-performance phase-field simulations are state-of-the-art approaches to clarifying dendrite solidification. However, major issues persist, such as the insufficiency of spatiotemporal resolution in experiments and lack of material properties in simulations. To overcome these issues, in this study, we developed a data assimilation system using an ensemble Kalman filter based on the phase-field lattice Boltzmann method as a simulation model for the dendrite solidification of binary alloys with liquid flow. The validity of the developed system was confirmed through twin experiments to infer the kinematic viscosity in a two-dimensional dendrite growth problem with forced convection.

Data assimilation with phase-field lattice Boltzmann method for dendrite growth with liquid flow and solid motion
Ayano Yamamura, Shinji Sakane, Munekazu Ohno, Hideyuki Yasuda, Tomohiro Takaki
Computational Materials Science, 215, Dec. 2022, [Peer-reviewed]
English, Scientific journal

Validating a mean-field theory via large-scale phase-field simulations for abnormal grain growth induced by nonuniform grain boundary properties
Eisuke Miyoshi, Munekazu Ohno, Yasushi Shibuta, Akinori Yamanaka, Tomohiro Takaki
Journal of Materials Science, 57, 35, 16690, 16709, Springer Science and Business Media LLC, 07 Sep. 2022, [Peer-reviewed]
Scientific journal

Inverse analysis of anisotropy of solid-liquid interfacial free energy based on machine learning
Geunwoo Kim, Ryo Yamada, Tomohiro Takaki, Yasushi Shibuta, Munekazu Ohno
Computational Materials Science, 207, May 2022, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal

Time invariance of three-dimensional morphology of equiaxed dendrite: A phase-field study
Ryo Yamada, Mikihiro Kudo, Geunwoo Kim, Tomohiro Takaki, Yasushi Shibuta, Munekazu Ohno
Computational Materials Science, 204, Mar. 2022, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal

Phase-field study on an array of tilted columnar dendrites during the directional solidification of a binary alloy
Tomohiro Takaki, Shinji Sakane, Munekazu Ohno, Yasushi Shibuta, Takayuki Aoki
Computational Materials Science, 203, 111143, 111143, Elsevier BV, Feb. 2022, [Peer-reviewed]
Scientific journal

Application of Heat Transfer Coefficient Estimation Using Data Assimilation and a 1-D Solidification Model to 3-D Solidification Simulation
Toshihiko Oikawa, Yukinobu Natsume, Munekazu Ohno
ISIJ International, 62, 8, 1666, 1673, 2022, [Peer-reviewed], [Last author]
Scientific journal

Novel estimation method for anisotropic grain boundary properties based on Bayesian data assimilation and phase-field simulation
Eisuke Miyoshi, Munekazu Ohno, Yasushi Shibuta, Akinori Yamanaka, Tomohiro Takaki
Materials and Design, 210, 15 Nov. 2021, [Peer-reviewed]
Scientific journal

Bayesian Data Assimilation of Temperature Dependence of Solid-Liquid Interfacial Properties of Nickel.
Yuhi Nagatsuma, Munekazu Ohno, Tomohiro Takaki, Yasushi Shibuta
Nanomaterials (Basel, Switzerland), 11, 9, 06 Sep. 2021, [Peer-reviewed], [Invited], [International Magazine]
English, Scientific journal

Ostwald ripening under temperature gradient: A phase-field study
Ryo Yamada, Haruki Inubushi, Munekazu Ohno
Journal of Applied Physics, 130, 1, 07 Jul. 2021, [Peer-reviewed], [Last author]
Scientific journal

Configurational kinetics studied by Path Probability Method
Ryo Yamada, Munekazu Ohno, Tetsuo Mohri
Progress in Materials Science, 120, Jul. 2021, [Peer-reviewed]

Uniquely selected primary dendrite arm spacing during competitive growth of columnar grains in Al–Cu alloy
Jaehoon Lee, Munekazu Ohno, Yasushi Shibuta, Tomohiro Takaki
Journal of Crystal Growth, 558, 15 Mar. 2021, [Peer-reviewed], [Corresponding author]
English, Scientific journal

In-situ observation of abnormal grain growth in a low-alloyed carbon steel using SEM-EBSD
Genki Saito, Tianglong Zhang, Norihito Sakaguchi, Munekazu Ohno, Kiyotaka Matsuura, Masayoshi Takeuchi, Taichi Sano, Koki Minoguchi, Takuya Yamaoka
Materialia, 15, Mar. 2021, [Peer-reviewed]
English, Scientific journal

Competitive grain growth during directional solidification of a polycrystalline binary alloy: Three-dimensional large-scale phase-field study (vol 1, pg 104, 2018)
Tomohiro Takaki, Shinji Sakane, Munekazu Ohno, Yasushi Shibuta, Takayuki Aoki, Charles-Andre Gandin
MATERIALIA, 15, 104, 113, Mar. 2021, [Peer-reviewed]
English, Scientific journal

Effects of cooling rate after hot forging on precipitation of fine particles during subsequent normalizing and austenite grain growth during carburization of Al- And Nb-microalloyed case-hardening steel
Genki Saito, Norihito Sakaguchi, Munekazu Ohno, Kiyotaka Matsuura, Masayoshi Takeuchi, Taichi Sano, Koki Minoguchi, Takuya Yamaoka
ISIJ International, 61, 6, 1964, 1970, 2021, [Peer-reviewed]
Scientific journal

Large-scale phase-field study of anisotropic grain growth: Effects of misorientation-dependent grain boundary energy and mobility
Eisuke Miyoshi, Tomohiro Takaki, Shinji Sakane, Munekazu Ohno, Yasushi Shibuta, Takayuki Aoki
Computational Materials Science, 186, Jan. 2021, [Peer-reviewed]
English, Scientific journal

Quantitative phase-field modeling and simulations of solidification microstructures
Munekazu OHNO
ISIJ International, 60, 12, 2745, 2754, 15 Dec. 2020, [Peer-reviewed], [Invited], [Lead author, Corresponding author]
English

Effects of Concentrations of Micro-alloying Elements and Hot-forging Temperature on Austenite Grain Structure Formed during Carburization of Case-hardening Steel
Genki Saito, Norihito Sakaguchi, Munekazu Ohno, Kiyotaka Matsuura, Masayoshi Takeuchi, Taichi Sano, Koki Minoguchi, Takuya Yamaoka
ISIJ International, 60, 11, 2549, 2557, 15 Nov. 2020, [Peer-reviewed]
English, Scientific journal

Development of High Corrosion- and Wear-Resistant Al-Si Alloy Coating on AZ80 Mg Alloy by Hot Extrusion
Toko Tokunaga, Kazushi Sotomoto, Munekazu Ohno, Kiyotaka Matsuura
Journal of Materials Engineering and Performance, 29, 10, 6355, 6362, Oct. 2020, [Peer-reviewed]
English, Scientific journal

Overgrowth behavior at converging grain boundaries during competitive grain growth: A two-dimensional phase-field study
Chunwen Guo, Tomohiro Takaki, Shinji Sakane, Munekazu Ohno, Yasushi Shibuta, Tetsuo Mohri
International Journal of Heat and Mass Transfer, 160, Oct. 2020, [Peer-reviewed]
English, Scientific journal

Development of microstructure simulation system in sip-materials integration projects
Toshiyuki Koyama, Munekazu Ohno, Akinori Yamanaka, Tadashi Kasuya, Susumu Tsukamoto
Materials Transactions, 61, 11, 2047, 2051, 17 Jul. 2020, [Peer-reviewed]
English, Scientific journal

Permeability tensor for various columnar dendrite structures
Y. Mitsuyama, T. Takaki, S. Sakane, Y. Shibuta, M. Ohno
IOP Conference Series: Materials Science and Engineering, 861, 1, 12 Jun. 2020, [Peer-reviewed], [Last author]
International conference proceedings

Two-dimensional large-scale phase-field lattice Boltzmann simulation of polycrystalline equiaxed solidification with motion of a massive number of dendrites
Shinji Sakane, Tomohiro Takaki, Munekazu Ohno, Yasushi Shibuta, Takayuki Aoki
Computational Materials Science, 178, 01 Jun. 2020, [Peer-reviewed]
English, Scientific journal

Phase-field simulation of abnormal grain growth during carburization in Nb-added steel
Takahisa Kinoshita, Munekazu Ohno
Computational Materials Science, 177, 109558, 109558, May 2020, [Peer-reviewed], [Corresponding author]
English, Scientific journal

Bayesian inference of solid-liquid interfacial properties out of equilibrium
Munekazu Ohno, Yukimi Oka, Shinji Sakane, Yasushi Shibuta, Tomohiro Takaki
Physical Review E, 101, 5, 052121, 052121, May 2020, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, Scientific journal

Estimation of time-dependent heat transfer coefficient in unidirectional casting using a numerical model coupled with solidification analysis and data assimilation
Yukinobu Natsume, Yukimi Oka, Jota Ogawa, Munekazu Ohno
International Journal of Heat and Mass Transfer, 150, 119222, 119222, Apr. 2020, [Peer-reviewed], [Last author]
English, Scientific journal

Permeability tensor for columnar dendritic structures: Phase-field and lattice Boltzmann study
Yasumasa Mitsuyama, Tomohiro Takaki, Shinji Sakane, Yasushi Shibuta, Munekazu Ohno
Acta Materialia, 188, 282, 287, Apr. 2020, [Peer-reviewed], [Last author]
English, Scientific journal

Parameter estimation for heat transfer analysis during casting processes based on ensemble Kalman filter
Yukimi Oka, Munekazu Ohno
International Journal of Heat and Mass Transfer, 149, 119232, 119232, Mar. 2020, [Peer-reviewed], [Corresponding author]
English, Scientific journal

Microstructure refinement and mechanical properties improvement of Al-Si-Fe alloys by hot extrusion using a specially designed high-strain die
Shino Sakow, Toko Tokunaga, Munekazu Ohno, Kiyotaka Matsuura
Journal of Materials Processing Technology, 277, 116447, 116447, Mar. 2020, [Peer-reviewed]
English, Scientific journal

Accuracy evaluation of phase-field models for grain growth simulation with anisotropic grain boundary properties
Eisuke Miyoshi, Tomohiro Takaki, Munekazu Ohno, Yasushi Shibuta
ISIJ International, 60, 1, 160, 167, 2020, [Peer-reviewed]
English, Scientific journal

Large–scale phase–field lattice Boltzmann study on the effects of natural convection on dendrite morphology formed during directional solidification of a binary alloy
Tomohiro Takaki, Shinji Sakane, Munekazu Ohno, Yasushi Shibuta, Takayuki Aoki
Computational Materials Science, 171, Jan. 2020, [Peer-reviewed]
English, Scientific journal

Microstructure evolution during superplastic deformation of an Al-coated Mg alloy sheet
Toko Tokunaga, Munekazu Ohno
Journal of Alloys and Compounds, 805, 436, 443, 15 Oct. 2019, [Peer-reviewed], [Last author]
English, Scientific journal

Austenite memory during reverse transformation of steels at different heating rates
G. Saito, Tomoya Nakayama, Norihito Sakaguchi, Munekazu Ohno, Kiyotaka Matsuura, Masayoshi Takeuchi, Taichi Sano, Koki Minoguchi, Takuya Yamaoka
Materialia, 7, 100409, Sep. 2019, [Peer-reviewed]
English, Scientific journal

Simulation method based on phase-field lattice Boltzmann model for long-distance sedimentation of single equiaxed dendrite
Shinji Sakane, Tomohiro Takaki, Munekazu Ohno, Yasushi Shibuta
Computational Materials Science, 164, 39, 45, 15 Jun. 2019, [Peer-reviewed]
English, Scientific journal

Acceleration of phase-field lattice Boltzmann simulation of dendrite growth with thermosolutal convection by the multi-GPUs parallel computation with multiple mesh and time step method
Shinji Sakane, Tomohiro Takaki, Munekazu Ohno, Yasushi Shibuta, Takayuki Aoki
Modelling and Simulation in Materials Science and Engineering, 27, 5, 054004, 28 May 2019, [Peer-reviewed]
English, Scientific journal

Large-scale phase-field simulation of three-dimensional isotropic grain growth in polycrystalline thin films
Eisuke Miyoshi, Tomohiro Takaki, Munekazu Ohno, Yasushi Shibuta, Shinji Sakane, Takayuki Aoki
Modelling and Simulation in Materials Science and Engineering, 27, 5, 054003, 16 May 2019, [Peer-reviewed]
English, Scientific journal

Micrometer-scale molecular dynamics simulation of microstructure formation linked with multi-phase-field simulation in same space scale
Yasushi Shibuta, Shinji Sakane, Eisuke Miyoshi, Tomohiro Takaki, Munekazu Ohno
Modelling and Simulation in Materials Science and Engineering, 27, 5, 054002, 16 May 2019, [Peer-reviewed], [Last author]
English, Scientific journal

Competitive growth during directional solidification of a binary alloy with natural convection: Two-dimensional phase-field study
Tomohiro Takaki, Shinji Sakane, Munekazu Ohno, Yasushi Shibuta
Modelling and Simulation in Materials Science and Engineering, 27, 5, 054001, 07 May 2019, [Peer-reviewed]
English, Scientific journal

A parametric study of morphology selection in equiaxed dendritic solidification
Geunwoo Kim, Tomohiro Takaki, Yasushi Shibuta, Shinji Sakane, Kiyotaka Matsuura, Munekazu Ohno
Computational Materials Science, 162, 76, 81, May 2019, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal

Importance of microstructural evolution on prediction accuracy of microsegregation in Al-Cu and Fe-Mn alloys
Munekazu Ohno, Masayoshi Yamashita, Kiyotaka Matsuura
International Journal of Heat and Mass Transfer, 132, 1004, 1017, Apr. 2019, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Fabrication of Al-Coated Mg–Li Alloy Sheet and Investigation of Its Properties
Tian Long Zhang, Toko Tokunaga, Munekazu Ohno, Mi Lin Zhang, Kiyotaka Matsuura
Acta Metallurgica Sinica (English Letters), 32, 2, 169, 177, 04 Feb. 2019, [Peer-reviewed]
English, Scientific journal

Permeability prediction for flow normal to columnar solidification structures by large–scale simulations of phase–field and lattice Boltzmann methods
Tomohiro Takaki, Shinji Sakane, Munekazu Ohno, Yasushi Shibuta, Takayuki Aoki
Acta Materialia, 164, 237, 249, 01 Feb. 2019, [Peer-reviewed]
English, Scientific journal

Effects of Fine Precipitates on Austenite Grain Refinement of Micro-alloyed Steel during Cyclic Heat Treatment
Genki Saito, Norihito Sakaguchi, Munekazu Ohno, Kiyotaka Matsuura, Masayoshi Takeuchi, Taichi Sano, Koki Minoguchi, Takuya Yamaoka
ISIJ International, 59, 11, 2091, 2098, 2019, [Peer-reviewed]
English, Scientific journal

Multi-phase-field modeling of transformation kinetics at multiple scales and its application to welding of steel
Munekazu Ohno, Yasushi Shibuta, Tomohiro Takaki
Materials Transactions, 60, 2, 170, 179, 2019, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Effect of cold-deformation on austenite grain growth behavior in solution-treated low alloy steel
Xianguang Zhang, Kiyotaka Matsuura, Munekazu Ohno
Metals, 8, 12, Dec. 2018, [Peer-reviewed], [Last author]
English, Scientific journal

Macrosegregation simulation model based on Lattice-Boltzmann method with high computational efficiency
Munekazu Ohno, Hayato Sato
International Journal of Heat and Mass Transfer, 127, 561, 570, Dec. 2018, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Low temperature superplasticity of a dual-phase Mg-Li-Zn alloy processed by a multi-mode deformation process
Tianlong Zhang, Toko Tokunaga, Munekazu Ohno, Ruizhi Wu, Milin Zhang, Kiyotaka Matsuura
Materials Science and Engineering A, 737, 61, 68, 08 Nov. 2018, [Peer-reviewed]
English, Scientific journal

Correlation between three-dimensional and cross-sectional characteristics of ideal grain growth: large-scale phase-field simulation study
Eisuke Miyoshi, Tomohiro Takaki, Munekazu Ohno, Yasushi Shibuta, Shinji Sakane, Takashi Shimokawabe, Takayuki Aoki
Journal of Materials Science, 53, 21, 15165, 15180, 01 Nov. 2018, [Peer-reviewed]
English, Scientific journal

Competitive grain growth during directional solidification of a polycrystalline binary alloy: Three-dimensional large-scale phase-field study
Tomohiro Takaki, Shinji Sakane, Munekazu Ohno, Yasushi Shibuta, Takayuki Aoki, Charles André Gandin
Materialia, 1, 104, 113, Sep. 2018, [Peer-reviewed]
English, Scientific journal

Advent of cross-scale modeling: High-performance computing of solidification and grain growth
Yasushi Shibuta, Munekazu Ohno, Tomohiro Takaki
Advanced Theory and Simulations, 1, 9, 201800065, Sep. 2018, [Peer-reviewed], [Invited]
English, Scientific journal

Bridging molecular dynamics and phase-field methods for grain growth prediction
Eisuke Miyoshi, Tomohiro Takaki, Yasushi Shibuta, Munekazu Ohno
Computational Materials Science, 152, 118, 124, Sep. 2018, [Peer-reviewed], [Last author]
English, Scientific journal

Coatings on Mg alloys and their mechanical properties: A review
Toko Tokunaga, Munekazu Ohno, Kiyotaka Matsuura
Journal of Materials Science and Technology, 34, 7, 1119, 1126, Jul. 2018, [Peer-reviewed], [Invited]
English, Scientific journal

Grain growth kinetics in submicrometer-scale molecular dynamics simulation
Shin Okita, Eisuke Miyoshi, Shinji Sakane, Tomohiro Takaki, Munekazu Ohno, Yasushi Shibuta
Acta Materialia, 153, 108, 116, Jul. 2018, [Peer-reviewed]
English, Scientific journal

Phase-field lattice Boltzmann simulations of multiple dendrite growth with motion, collision, and coalescence and subsequent grain growth
Tomohiro Takaki, Ryotaro Sato, Roberto Rojas, Munekazu Ohno, Yasushi Shibuta
Computational Materials Science, 147, 124, 131, May 2018, [Peer-reviewed]
English, Scientific journal

Three-dimensional morphologies of inclined equiaxed dendrites growing under forced convection by phase-field-lattice Boltzmann method
Shinji Sakane, Tomohiro Takaki, Munekazu Ohno, Yasushi Shibuta, Takashi Shimokawabe, Takayuki Aoki
Journal of Crystal Growth, 483, 147, 155, 01 Feb. 2018, [Peer-reviewed]
English, Scientific journal

Annealing behavior of surface-locally cold-deformed low-carbon steel with a large strain gradient
Xianguang Zhang, Kiyotaka Matsuura, Munekazu Ohno
Metals, 8, 11, 2018, [Peer-reviewed], [Last author]
English, Scientific journal

Brazed Bonding between SiAlON and heat-resistant alloys with application of filler materials
Toko Tokunaga, Masayuki Koshiyama, Kazuya Kurokawa, Munekazu Ohno, Kiyotaka Matsuura
Materials Transactions, 59, 6, 969, 975, 2018, [Peer-reviewed]
English, Scientific journal

Coating on magnesium alloy with super duralumin by hot extrusion and evaluation of its surface properties
Toko Tokunaga, Kazushi Sotomoto, Munekazu Ohno, Kiyotaka Matsuura
Materials Transactions, 59, 3, 432, 436, 2018, [Peer-reviewed]
English, Scientific journal

Acceleration of macrosegregation simulation based on lattice boltzmann method
Munekazu Ohno, Hayato Sato
ISIJ International, 58, 1, 114, 122, 2018, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Fabrication of unidirectionally orientated carbon fiber reinforced cu-based composites by hot extrusion and evaluation of their thermal properties
Hiroto Kontani, Toko Tokunaga, Munekazu Ohno, Katsuhiko Sasaki, Kiyotaka Matsuura
Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, 82, 5, 125, 129, 2018, [Peer-reviewed]
Japanese

Heterogeneity in homogeneous nucleation from billion-atom molecular dynamics simulation of solidification of pure metal
Yasushi Shibuta, Shinji Sakane, Eisuke Miyoshi, Shin Okita, Tomohiro Takaki, Munekazu Ohno
Nature Communications, 8, 1, 10, 10, 01 Dec. 2017, [Peer-reviewed], [Last author], [International Magazine]
English, Scientific journal

Ultra-large-scale phase-field simulation study of ideal grain growth
Eisuke Miyoshi, Tomohiro Takaki, Munekazu Ohno, Yasushi Shibuta, Shinji Sakane, Takashi Shimokawabe, Takayuki Aoki
npj Computational Materials, 3, 1, 25, 01 Dec. 2017, [Peer-reviewed]
English, Scientific journal

Variational formulation of a quantitative phase-field model for nonisothermal solidification in a multicomponent alloy
Munekazu Ohno, Tomohiro Takaki, Yasushi Shibuta
Physical Review E, 96, 3, 033311, 033311, 20 Sep. 2017, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, Scientific journal

Phase-field-lattice Boltzmann studies for dendritic growth with natural convection
Tomohiro Takaki, Roberto Rojas, Shinji Sakane, Munekazu Ohno, Yasushi Shibuta, Takashi Shimokawabe, Takayuki Aoki
Journal of Crystal Growth, 474, 146, 153, 15 Sep. 2017, [Peer-reviewed]
English, Scientific journal

Molecular dynamics simulations investigating consecutive nucleation, solidification and grain growth in a twelve-million-atom Fe-system
Shin Okita, Wolfgang Verestek, Shinji Sakane, Tomohiro Takaki, Munekazu Ohno, Yasushi Shibuta
Journal of Crystal Growth, 474, 140, 145, 15 Sep. 2017, [Peer-reviewed]
English, Scientific journal

Multi-GPUs parallel computation of dendrite growth in forced convection using the phase-field-lattice Boltzmann model
Shinji Sakane, Tomohiro Takaki, Roberto Rojas, Munekazu Ohno, Yasushi Shibuta, Takashi Shimokawabe, Takayuki Aoki
Journal of Crystal Growth, 474, 154, 159, 15 Sep. 2017, [Peer-reviewed]
English, Scientific journal

Numerical testing of quantitative phase-field models with different polynomials for isothermal solidification in binary alloys
Munekazu Ohno, Tomohiro Takaki, Yasushi Shibuta
Journal of Computational Physics, 335, 621, 636, Apr. 2017, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Parameter estimation in heat conduction problem of casting processes based on data assimilation
Yukimi Oka, Munekazu Ohno, Kiyotaka Matsuura
Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 103, 12, 755, 762, 2017, [Peer-reviewed], [Corresponding author]
Japanese

Prediction of Microsegregation Behavior in Fe-based Alloys Based on Machine Learning
Munekazu Ohno, Daichi Kimura, Kiyotaka Matsuura
TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 103, 12, 45, 53, 2017, [Peer-reviewed], [Lead author, Corresponding author]
Japanese

Prediction of microsegregation based on machine learning and its extension to a macrosegregation simulation
Munekazu Ohno, Daichi Kimura, Kiyotaka Matsuura
Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 103, 12, 720, 729, 2017, [Peer-reviewed], [Lead author, Corresponding author]
Japanese

Fabrication of carbon fiber oriented al-based composites by hot extrusion and evaluation of their thermal conductivity
Toko Tokunaga, Koichi Takahashi, Munekazu Ohno, Katsuhiko Sasaki, Terumitsu Imanishi, Kiyotaka Matsuura
Materials Transactions, 58, 6, 938, 944, 2017, [Peer-reviewed]
English, Scientific journal

Bcc / B2 phase equilibria and phase transformation from B2 to β' in refractory Nb-X(Pd, Rh, Ir)-Al
T. Yamanouchi, S. Miura, M. Ohno, K. Ikeda
MRS Advances, 2, 25, 1335, 1340, 2017, [Peer-reviewed]
English, International conference proceedings

A molecular dynamics study of partitionless solidification and melting of Al-Cu alloys
Sankar Kumar Deb Nath, Yasushi Shibuta, Munekazu Ohno, Tomohiro Takaki, Tetsuo Mohri
ISIJ International, 57, 10, 1774, 1779, 2017, [Peer-reviewed]
English, Scientific journal

Coating on magnesium alloy with super duralumin by hot extrusion and evaluation of its surface properties
Toko Tokunaga, Kazushi Sotomoto, Munekazu Ohno, Kiyotaka Matsuura
Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, 81, 8, 389, 393, 2017, [Peer-reviewed]
Japanese

Brazed bonding between SiAlON and heat-resistant alloys with application of filler materials
Toko Tokunaga, Masayuki Koshiyama, Kazuya Kurokawa, Munekazu Ohno, Kiyotaka Matsuura
Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, 81, 3, 143, 149, 2017, [Peer-reviewed]
Japanese

Primary arm array during directional solidification of a single-crystal binary alloy: Large-scale phase-field study
Tomohiro Takaki, Shinji Sakane, Munekazu Ohno, Yasushi Shibuta, Takashi Shimokawabe, Takayuki Aoki
Acta Materialia, 118, 230, 243, 01 Oct. 2016, [Peer-reviewed]
English, Scientific journal

Wafer-scale fabrication and growth dynamics of suspended graphene nanoribbon arrays
Hiroo Suzuki, Toshiro Kaneko, Yasushi Shibuta, Munekazu Ohno, Yuki Maekawa, Toshiaki Kato
Nature Communications, 7, 11797, 11797, 02 Jun. 2016, [Peer-reviewed], [International Magazine]
English, Scientific journal

Two-dimensional phase-field study of competitive grain growth during directional solidification of polycrystalline binary alloy
Tomohiro Takaki, Munekazu Ohno, Yasushi Shibuta, Shinji Sakane, Takashi Shimokawabe, Takayuki Aoki
Journal of Crystal Growth, 442, 14, 24, 15 May 2016, [Peer-reviewed]
English, Scientific journal

Submicrometer-scale molecular dynamics simulation of nucleation and solidification from undercooled melt: Linkage between empirical interpretation and atomistic nature
Yasushi Shibuta, Shinji Sakane, Tomohiro Takaki, Munekazu Ohno
Acta Materialia, 105, 328, 337, 15 Feb. 2016, [Peer-reviewed], [Last author]
English, Scientific journal

Al被覆Mg合金薄板材の作製およびその機械的性質の調査　　　　　　　　　　　　　　　
徳永透子, 大野宗一, 松浦清隆
Journal of Functionally Graded Materials, 30, 1, 4, 2016, [Peer-reviewed]

Grain refinement and ductility improvement by hot extrusion using a heteromorphic die with small holes
Kaho Tomita, Toko Tokunaga, Munekazu Ohno, Kiyotaka Matsuura
Materials Transactions, 57, 6, 927, 934, 2016, [Peer-reviewed]
English, Scientific journal

The relationship between the spark plasma sintering temperature and mechanical properties of combustion-synthesized α- And β-SiAlON
Masayuki Koshiyama, Hazuki Sako, Munekazu Ohno, Kiyotaka Matsuura
Materials Transactions, 57, 9, 1593, 1596, 2016, [Peer-reviewed]
English, Scientific journal

Fabrication of carbon fiber oriented al-based composites by hot extrusion and evaluation of their thermal conductivity
Toko Tokunaga, Koichi Takahashi, Munekazu Ohno, Katsuhiko Sasaki, Terumitsu Imanishi, Kiyotaka Matsuura
Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, 80, 10, 640, 645, 2016, [Peer-reviewed]
Japanese

Large-scale phase-field studies of three-dimensional dendrite competitive growth at the converging grain boundary during directional solidification of a bicrystal binary alloy
Tomohiro Takaki, Shinji Sakane, Munekazu Ohno, Yasushi Shibuta, Takashi Shimokawabe, Takayuki Aoki
ISIJ International, 56, 8, 1427, 1435, 2016, [Peer-reviewed]
English, Scientific journal

Fabrication of Al-coated Mg alloy sheet and investigation of its mechanical properties
T. Tokunaga, M. Ohno, K. Matsuura
Journal of Functionally Graded Materials, 30, 1, 4, Functionally Graded Materials FORUM of Japan, 2016, [Peer-reviewed]
English, In order to achieve a light and corrosion-resistant structural material, Al-coated Mg alloy sheet has been fabricated by hot extrusion followed by hot rolling. The sheet was successfully rolled at 623 K without any breaking of the Al coating layer, and the sheet exhibited an excellent corrosion resistance. The mechanical properties have been investigated by tensile tests at various temperatures and strain rates. At room temperature, the stress value drops immediately after reaching the maximum, while the value decreases as the temperature increases and the strain rate decreases. It has been demonstrated that the sheet exhibits elongation of 707 % at 573 K at 1.0×10-3 s-1 when tensile-tested in the rolling direction. After the elongation, the Al coating layer remained on the Mg alloy substrate. No cracks or debonding were observed at interfaces of Mg alloy/Al3Mg2 and Al3Mg2/Al.

Variational formulation and numerical accuracy of a quantitative phase-field model for binary alloy solidification with two-sided diffusion
Munekazu Ohno, Tomohiro Takaki, Yasushi Shibuta
PHYSICAL REVIEW E, 93, 1, 012802, 012802, Jan. 2016, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, Scientific journal

Experimental Verification of a Critical Condition for the Formation of As-Cast Coarse Columnar Austenite Grain Structure in a Hyperperitectic Carbon Steel
Munekazu Ohno, Masato Maruyama, Kiyotaka Matsuura
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 46, 11, 5240, 5247, 01 Nov. 2015, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

A phase-field-lattice Boltzmann method for modeling motion and growth of a dendrite for binary alloy solidification in the presence of melt convection
Roberto Rojas, Tomohiro Takaki, Munekazu Ohno
Journal of Computational Physics, 298, 29, 40, 01 Oct. 2015, [Peer-reviewed], [Last author]
English, Scientific journal

Sensitivity analysis for thickness uniformity of Al coating layer in extrusion of Mg/Al clad bar
Toko Tokunaga, Danuta Szeliga, Kiyotaka Matsuura, Munekazu Ohno, Maciej Pietrzyk
International Journal of Advanced Manufacturing Technology, 80, 1-4, 507, 513, 19 Sep. 2015, [Peer-reviewed]
English, Scientific journal

A role of interfacial energy balance in delta to gamma transformation kinetics in carbon steel with dispersed second phase particles analyzed by phase-field simulation
Daisuke Sato, Munekazu Ohno, Kiyotaka Matsuura
Computational Materials Science, 106, 188, 192, 01 Sep. 2015, [Peer-reviewed], [Corresponding author]
English, Scientific journal

Homogeneous nucleation and microstructure evolution in million-atom molecular dynamics simulation
Yasushi Shibuta, Kanae Oguchi, Tomohiro Takaki, Munekazu Ohno
Scientific Reports, 5, 13534, 13534, 27 Aug. 2015, [Peer-reviewed], [Last author], [International Magazine]
English, Scientific journal

Solidification in a Supercomputer: From Crystal Nuclei to Dendrite Assemblages
Yasushi Shibuta, Munekazu Ohno, Tomohiro Takaki
JOM, 67, 8, 1793, 1804, 27 Aug. 2015, [Peer-reviewed]
English, Scientific journal

Relationships between spark plasma sintering temperature and mechanical properties of combustion-synthesized α- andβ-SiAlON
Masayuki Koshiyama, Hazuki Sako, Munekazu Ohno, Kiyotaka Matsuura
Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, 79, 4, 191, 194, Apr. 2015, [Peer-reviewed]
Japanese

Grain refinement and ductility improvement by hot extrusion using a heteromorphic die with small holes
Kaho Tomita, Toko Tokunaga, Munekazu Ohno, Kiyotaka Matsuura
Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, 79, 4, 183, 190, Apr. 2015, [Peer-reviewed]
Japanese

Phase-Field Simulations and Analysis of Effect of Dispersed Particles on Migration of Delta to Gamma Transformation Interface
Daisuke Sato, Munekazu Ohno, Kiyotaka Matsuura
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 46, 2, 981, 988, Feb. 2015, [Peer-reviewed], [Corresponding author]
English, Scientific journal

Microstructural features and formation processes of as-cast austenite grain structures in hypoperitectic carbon steels
Munekazu Ohno, Shingo Tsuchiya, Kiyotaka Matsuura
ISIJ International, 55, 11, 2374, 2382, 2015, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Physical and numerical modelling of backward extrusion of Mg alloy with Al coating
Lukasz Madej, Toko Tokunaga, Kiyotaka Matsuura, Munekazu Ohno, Maciej Pietrzyk
CIRP Annals - Manufacturing Technology, 64, 1, 253, 256, 2015, [Peer-reviewed]
English, Scientific journal

Increase of Austenite Grain Coarsening Temperature in Banded Ferrite/Pearlite Steel by Cold Deformation
Xianguang Zhang, Kiyotaka Matsuura, Munekazu Ohno
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 46, 1, 32, 36, Jan. 2015, [Peer-reviewed]
English, Scientific journal

Two-dimensional phase-field simulations of dendrite competitive growth during the directional solidification of a binary alloy bicrystal
Tomohiro Takaki, Munekazu Ohno, Takashi Shimokawabe, Takayuki Aoki
Acta Materialia, 81, 272, 283, Dec. 2014, [Peer-reviewed]
English, Scientific journal

Million-atom molecular dynamics simulation on spontaneous evolution of anisotropy in solid nucleus during solidification of iron
Yasushi Shibuta, Kanae Oguchi, Munekazu Ohno
Scripta Materialia, 86, 20, 23, 01 Sep. 2014, [Peer-reviewed], [Last author]
English, Scientific journal

Abnormal grain growth in austenite structure reversely transformed from ferrite/pearlite-banded structure
Xianguang Zhang, Kiyotaka Matsuura, Munekazu Ohno
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 45, 10, 4623, 4634, Sep. 2014, [Peer-reviewed], [Last author]
English, Scientific journal

Superplastic behavior of Al-coated Mg alloy sheet
Toko Tokunaga, Kiyotaka Matsuura, Munekazu Ohno
Journal of Alloys and Compounds, 601, 179, 185, 15 Jul. 2014, [Peer-reviewed], [Last author]
English, Scientific journal

Misorientation/local plastic strain manifestations in chemical etching color
Xianguang Zhang, Kiyotaka Matsuura, Munekazu Ohno
Micron, 59, 28, 32, Apr. 2014, [Peer-reviewed], [Last author], [International Magazine]
English, Scientific journal

Analysis of Solidification Microstructure by Phase-Field Method
Munekazu Ohno
TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 100, 11, 758, 764, 2014, [Peer-reviewed]
Japanese, Scientific journal

Corrosion resistance and tensile property of Al-coated Mg-Li alloy produced by hot extrusion
Kaho Tomita, Kiyotaka Matsuura, Munekazu Ohno, Toko Tokunaga, Ruizhi Wu, Milin Zhang
Key Engineering Materials, 641, 69, 80, Trans Tech Publications Ltd, 2014, [Peer-reviewed]
English, International conference proceedings

Transient Liquid Phase bonding of γTiAl using Al Films and SPS method　　　　　　　　　　　　　　　
K. Szastak, K. Matsuura, D. Kata, M. Ohno
Journal of Achievements in Materials and Manufacturing Engineering, 67, 5, 13, 2014, [Peer-reviewed]
English, Scientific journal

A critical condition for the formation of a coarse columnar γ grain structure in a peritectic solidified carbon steel
Munekazu Ohno, Masato Maruyama, Kiyotaka Matsuura
Acta Materialia, 61, 19, 7334, 7341, Nov. 2013, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Quantification of local plastic strain distribution beneath surface of deformed iron
Xianguang Zhang, Kiyotaka Matsuura, Munekazu Ohno, Seiichi Suzuki
Materials Science and Engineering A, 564, 169, 175, 01 Mar. 2013, [Peer-reviewed]
English, Scientific journal

TiC coating on titanium by carbonization reaction using spark plasma sintering
Tomohiro Hayashi, Kiyotaka Matsuura, Munekazu Ohno
Materials Transactions, 54, 11, 2098, 2101, 2013, [Peer-reviewed]
English, Scientific journal

Unexpected selection of growing dendrites by very-large-scale phase-field simulation
Tomohiro Takaki, Takashi Shimokawabe, Munekazu Ohno, Akinori Yamanaka, Takayuki Aoki
Journal of Crystal Growth, 382, 21, 25, 2013, [Peer-reviewed]
English, Scientific journal

TiC Coating and Ti (C,N) Coating on Titanium
松浦清隆, 林知宏, 林知宏, 大野宗一
チタン, 61, 2, 141, 145, 日本チタン協会, 2013, [Peer-reviewed]
Japanese

Theoretical and numerical investigations on grain boundary migration due to inverse pinning
Munekazu Ohno, Shinpei Ohyama, Kiyotaka Matsuura
Computational Materials Science, 79, 558, 563, 2013, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Existence or nonexistence of thermal pinning effect in grain growth under temperature gradient
Munekazu Ohno, Taichi Yamaguchi, Daisuke Sato, Kiyotaka Matsuura
Computational Materials Science, 69, 7, 13, 2013, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

On the kinetics of TiAl 3 intermetallic layer formation in the titanium and aluminum diffusion couple
Mostafa Mirjalili, Mansour Soltanieh, Kiyotaka Matsuura, Munekazu Ohno
Intermetallics, 32, 297, 302, Jan. 2013, [Peer-reviewed]
English, Scientific journal

Quantitative phase-field modeling of nonisothermal solidification in dilute multicomponent alloys with arbitrary diffusivities
Munekazu Ohno
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 86, 5, 051603, 051603, 08 Nov. 2012, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, Scientific journal

Austenite grain growth in peritectic solidified carbon steels analyzed by phase-field simulation
Munekazu Ohno, Shingo Tsuchiya, Kiyotaka Matsuura
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 43, 6, 2031, 2042, Jun. 2012, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Combustion synthesis of TiB 2 based hard material cemented by Fe-Al intermetallics
Y. Li, K. Matsuura, M. Ohno, Y. M. Gao, J. Yu
Powder Metallurgy, 55, 2, 162, 167, Apr. 2012, [Peer-reviewed]
English, Scientific journal

Transition of solidification mode and the as-cast γ grain structure in hyperperitectic carbon steels
Shingo Tsuchiya, Munekazu Ohno, Kiyotaka Matsuura
Acta Materialia, 60, 6-7, 2927, 2938, Apr. 2012, [Peer-reviewed], [Corresponding author]
English, Scientific journal

TiAl3 formation in the titanium-aluminum diffusion couple
Mostafa Mirjalili, Mansour Soltanieh, Kiyotaka Matsuura, Munekazu Ohno
Defect and Diffusion Forum, 322, 185, 194, Trans Tech Publications Ltd, 15 Mar. 2012, [Peer-reviewed], [Last author]
English, Scientific journal

Phase evolution, microstructure and hardness of TiB 2-based cocontaining composite by SHS under pseudo-isostatic pressure
Marta Ziemnicka-Sylwester, Kiyotaka Matsuura, Munekazu Ohno
ISIJ International, 52, 9, 1698, 1704, 2012, [Peer-reviewed]
English, Scientific journal

Effects of Ti addition on austenite grain growth during reheating of As-Cast 0.2 mass% Carbon Steel
Munekazu Ohno, Chihiro Murakami, Kiyotaka Matsuura, Kohichi Isobe
ISIJ International, 52, 10, 1832, 1840, 2012, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Effects of second phase particles on migration of α/γ interface during isothermal α to γ transformation
Liang Chen, Kiyotaka Matsuura, Munekazu Ohno, Daisuke Sato
ISIJ International, 52, 10, 1841, 1847, 2012, [Peer-reviewed]
English, Scientific journal

Aluminum coating on magnesium-based alloy by hot extrusion and its characteristics
Toko Tokunaga, Kiyotaka Matsuura, Munekazu Ohno
Materials Transactions, 53, 6, 1034, 1041, 2012, [Peer-reviewed]
English, Scientific journal

TiC coating on titanium by carbonization reaction using spark plasma sintering
Tomohiro Hayashi, Kiyotaka Matsuura, Munekazu Ohno
Keikinzoku/Journal of Japan Institute of Light Metals, 62, 6, 233, 236, 2012, [Peer-reviewed]
Japanese

Effects of second phase particle dispersion on kinetics of isothermal peritectic transformation in Fe-C alloy
Liang Chen, Kiyotaka Matsuura, Daisuke Sato, Munekazu Ohno
ISIJ International, 52, 3, 434, 440, 2012, [Peer-reviewed]
English, Scientific journal

Aluminum coating on magnesium-based alloy by hot extrusion and its characteristics
Toko Tokunaga, Kiyotaka Matsuura, Munekazu Ohno
Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, 75, 11, 633, 639, Nov. 2011, [Peer-reviewed]
Japanese

Formation conditions of coarse columnar austenite grain structure in peritectic carbon steels by the discontinuous grain growth mechanism
Munekazu Ohno, Shingo Tsuchiya, Kiyotaka Matsuura
Acta Materialia, 59, 14, 5700, 5709, Aug. 2011, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Formation mechanism of coarse columnar γ grains in as-cast hyperperitectic carbon steels
S. Tsuchiya, M. Ohno, K. Matsuura, K. Isobe
Acta Materialia, 59, 9, 3334, 3342, May 2011, [Peer-reviewed], [Corresponding author]
English, Scientific journal

熱間押出法によるマグネシウム合金のアルミニウム被覆とその材質調査
徳永透子, 松浦清隆, 大野宗一
日本金属学会誌, 75, 11, 633, 639, 2011, [Peer-reviewed]
Japanese, Scientific journal

Combustion synthesis of TiC-TiB 2-based cermets from elemental powders
Jun Yu, Kiyotaka Matsuura, Munekazu Ohno
Advances in Tribology, 105258, 2011, [Peer-reviewed]
English, Scientific journal

Suppression of coarse columnar grain formation in As-cast austenite structure of a hyperperitectic carbon steel by Nb addition
Munekazu Ohno, Tetsuya Yamaguchi, Kiyotaka Matsuura, Kohichi Isobe
ISIJ International, 51, 11, 1831, 1837, 2011, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Diffusion-controlled peritectic reaction process in carbon steel analyzed by quantitative phase-field simulation
Munekazu Ohno, Kiyotaka Matsuura
Acta Materialia, 58, 18, 6134, 6141, Oct. 2010, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Quantitative phase-field modeling for two-phase solidification process involving diffusion in the solid
Munekazu Ohno, Kiyotaka Matsuura
Acta Materialia, 58, 17, 5749, 5758, Oct. 2010, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Changes in microstructure and mechanical properties of cast Al-Si alloy due to hot rolling
Kazuhiro Toyama, Kiyotaka Matsuura, Munekazu Ohno, Taiki Sato, Masanori Nakayama
Keikinzoku/Journal of Japan Institute of Light Metals, 60, 1, 7, 11, Jan. 2010, [Peer-reviewed]
Japanese

As-cast austenite grain structure in Al added 0.2 wt% carbon steel
Surya Kencana, Munekazu Ohno, Kiyotaka Matsuura, Kohichi Isobe
ISIJ International, 50, 2, 231, 238, 2010, [Peer-reviewed]
English, Scientific journal

Multi-scale phase field simulation of disorder-order transition, combined with cluster variation and path probability methods
Munekazu Ohno, Ying Chen, Tetsuo Mohri
Materials Science Forum, 631-632, 401, 406, 2010, [Peer-reviewed], [Lead author, Corresponding author]
English, International conference proceedings

Effects of strain-graded plastic deformation on mechanical properties of metals　　　　　　　　　　　　　　　
K. Matsuura, M. Ohno
Advances in Science and Technology, 63, 348, 351, 2010, [Peer-reviewed]
English, Scientific journal

Methodological progress for computer simulation of solidification and casting
Keiji Nakajima, Hongwei Zhang, Katsunari Oikawa, Munekazu Ohno, Pär G. Jönsson
ISIJ International, 50, 12, 1724, 1734, 2010, [Peer-reviewed]
English, International conference proceedings

Effects of Al and P additions on As-cast austenite grain structure in 0.2mass% carbon steel
Surya Kencana, Munekazu Ohno, Kiyotaka Matsuura, Kohichi Isobe
ISIJ International, 50, 12, 1965, 1971, 2010, [Peer-reviewed]
English, International conference proceedings

マイクロTIG溶接法による鉄系材料のアルミナイド被覆
大井川央, 大野宗一, 松浦清隆
傾斜機能材料論文集, 24, 53, 57, 2010, [Peer-reviewed]
Japanese

塑性ひずみ傾斜加工を施したAl-Si鋳造材の機械的性質
大野宗一, 松浦清隆
傾斜機能材料論文集, 24, 58, 63, 2010, [Peer-reviewed], [Lead author]
Japanese

Effects of Cr addition on Coarse Columnar austenite structure in As-cast 0.2mass% carbon steel
Shingo Tsuchiya, Munekazu Ohno, Kiyotaka Matsuura, Kohichi Isobe
ISIJ International, 50, 12, 1959, 1964, 2010, [Peer-reviewed]
English, International conference proceedings

Motion and morphology of triple junction in peritectic reaction analyzed by quantitative phase-field model
Munekazu Ohno, Kiyotaka Matsuura
ISIJ International, 50, 12, 1879, 1885, 2010, [Peer-reviewed], [Lead author, Corresponding author]
English, International conference proceedings

Synthesis of Functionally Graded Intermetallics　　　　　　　　　　　　　　　
Kiyotaka Matsuura, Naoki Mizuta, Munekazu Ohno
Materials Science and Technology, Vol. 4, 46, 151, 2010, [Peer-reviewed]

Thermodynamic calculation of phase equilibria in As-Fe-In ternary system based on CALPHAD approach
Munekazu Ohno, Kanji Yoh
Materials Transactions, 50, 5, 1202, 1207, May 2009, [Peer-reviewed], [Lead author, Corresponding author]
English, International conference proceedings

Quantitative phase-field modeling for dilute alloy solidification involving diffusion in the solid
Munekazu Ohno, Kiyotaka Matsuura
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 79, 3, 031603, 031603, 03 Mar. 2009, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, Scientific journal

Effects of addition of titanium and boron on columnar austenite grain in carbon steel
Masayoshi Sasaki, Kiyotaka Matsuura, Kenichi Ohsasa, Munekazu Ohno
ISIJ International, 49, 9, 1367, 1371, 2009, [Last author]
English, Scientific journal

Combustion synthesis of TiC-based cemented carbide alloy and effect of preheating treatment on porosity
Keisuke Kojima, Kiyotaka Matsuura, Kenichi Ohsasa, Munekazu Ohno
Keikinzoku/Journal of Japan Institute of Light Metals, 59, 1, 2, 6, Jan. 2009, [Peer-reviewed]
Japanese, Scientific journal

Numerical analysis on columnar-to-equiaxed transition of δ-Ferrite dendrite in carbon steel induced by titanium carbonitride particles
Munekazu Ohno, Kiyotaka Matsuura
ISIJ International, 49, 10, 1568, 1574, 2009, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Refinement of as-cast austenite grain in carbon steel by addition of Titanium
Masayoshi Sasaki, Kiyotaka Matsuura, Kenichi Ohsasa, Munekazu Ohno
ISIJ International, 49, 9, 1362, 1366, 2009, [Peer-reviewed]
English, Scientific journal

Effects of ti addition on as-cast γ grain structure in hyper-peritectic carbon steel
Shingo Tsuchiya, Munekazu Ohno, Kiyotaka Matsuura, Kohichi Isobe
Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 95, 9, 629, 635, 2009, [Peer-reviewed]
Japanese, Scientific journal

Titanium aluminide coating on titanium surface using aluminum plating and surface melting
Naoki Mizuta, Kiyotaka Matsuura, Munekazu Ohno, Yoshinari Miyamoto, Soshu Kirihara
Keikinzoku/Journal of Japan Institute of Light Metals, 58, 12, 656, 661, Dec. 2008, [Peer-reviewed]
Japanese, Scientific journal

Refinement of As-cast Austenite Grain in Carbon Steel by Addition of Titanium
Masayoshi Sasaki, Kiyotaka Matsuura, Kenichi Ohsasa, Munekazu Ohno
TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 94, 11, 491, 495, Nov. 2008, [Peer-reviewed]
Japanese, Scientific journal

Thermodynamic modeling of the system As-Fe combined with first-principles total energy calculations
Munekazu Ohno, Kanji Yoh
Journal of Crystal Growth, 310, 11, 2751, 2759, 15 May 2008, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Time-resolved and space-resolved Monte-Carlo analyses on spin relaxation anisotropy in InAs heterostructure
Munekazu Ohno, Kanji Yoh
Physica E: Low-Dimensional Systems and Nanostructures, 40, 5, 1539, 1541, Mar. 2008, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Phase equilibria, thermodynamics and solidification microstructures of Mg-Sn-Ca alloys, Part 2: Prediction of phase formation in Mg-rich Mg-Sn-Ca cast alloys
A. Kozlov, M. Ohno, T. Abu Leil, N. Hort, K. U. Kainer, R. Schmid-Fetzer
Intermetallics, 16, 2, 316, 321, Feb. 2008, [Peer-reviewed]
English, Scientific journal

Phase equilibria, thermodynamics and solidification microstructures of Mg-Sn-Ca alloys, Part 1: Experimental investigation and thermodynamic modeling of the ternary Mg-Sn-Ca system
A. Kozlov, M. Ohno, R. Arroyave, Z. K. Liu, R. Schmid-Fetzer
Intermetallics, 16, 2, 299, 315, Feb. 2008, [Peer-reviewed]
English, Scientific journal

Datta-Das-type spin-field-effect transistor in the nonballistic regime
Munekazu Ohno, Kanji Yoh
Physical Review B - Condensed Matter and Materials Physics, 77, 4, 045323, 22 Jan. 2008, [Peer-reviewed]
English, Scientific journal

Refinement of as-cast austenite microstructure in S45C steel by titanium addition
Munekazu Ohno, Kiyotaka Matsuura
ISIJ International, 48, 10, 1373, 1379, 2008, [Peer-reviewed]
English, Scientific journal

Effects of addition of titanium and boron on columnar austenite grain in carbon steel
Masayoshi Sasaki, Kiyotaka Matsuura, Kenichi Ohsasa, Munekazu Ohno
Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 94, 9, 331, 335, 2008, [Peer-reviewed]
Japanese, Scientific journal

Reassessment of the Al-Mn system and a thermodynamic description of the Al-Mg-Mn system
Yong Du, Jiong Wang, Jingrui Zhao, Julius Clemens Schuster, Franz Weitzer, Rainer Schmid-Fetzer, Munekazu Ohno, Honghui Xu, Zi Kui Liu, Shunli Shang, Wenqing Zhang
International Journal of Materials Research, 98, 9, 855, 871, Sep. 2007, [Peer-reviewed]
English, Scientific journal

Vanishing of inhomogeneous spin relaxation in InAs-based field-effect transistor structures
Munekazu Ohno, Kanji Yoh
Physical Review B - Condensed Matter and Materials Physics, 75, 24, 241308, 26 Jun. 2007, [Peer-reviewed]
English, Scientific journal

Interface between quantum-mechanical-based approaches, experiments, and CALPHAD methodology
Patrice E.A. Turchi, Igor A. Abrikosov, Benjamin Burton, Suzana G. Fries, Göran Grimvall, Larry Kaufman, Pavel Korzhavyi, V. Rao Manga, Munekazu Ohno, Alexander Pisch, Andrew Scott, Wenqing Zhang
Calphad: Computer Coupling of Phase Diagrams and Thermochemistry, 31, 1, 4, 27, Mar. 2007, [Peer-reviewed]
English, Scientific journal

Micromagnetic simulation of magnetization reversal process and stray field behavior in Fe thin film wire
Munekazu Ohno, Kanji Yoh
Journal of Applied Physics, 102, 12, 123908, 2007, [Peer-reviewed]
English, Scientific journal

From phase equilibria to transformation dynamics
T. Mohri, M. Ohno, Y. Chen
Defect and Diffusion Forum, 263, 21, 30, 2007, [Peer-reviewed]
English, International conference proceedings

Critical estimation of relaxation coefficient in TDGL equation based on path probability method
Munekazu Ohno, Tetsuo Mohri
Materials Transactions, 47, 11, 2718, 2724, Nov. 2006, [Peer-reviewed]
English, Scientific journal

Thermodynamic modeling of the Ca-Sn system based on finite temperature quantities from first-principles and experiment
M. Ohno, A. Kozlov, R. Arroyave, Z. K. Liu, R. Schmid-Fetzer
Acta Materialia, 54, 18, 4939, 4951, Oct. 2006, [Peer-reviewed], [Lead author]
English, Scientific journal

Liquidus and solidus temperatures of Mg-rich Mg-Al-Mn-Zn alloys
M. Ohno, D. Mirkovic, R. Schmid-Fetzer
Acta Materialia, 54, 15, 3883, 3891, Sep. 2006, [Peer-reviewed], [Lead author]
English, Scientific journal

Mg-rich phase equilibria of Mg-Mn-Zn alloys analyzed by computational thermochemistry
M. Ohno, R. Schmid-Fetzer
International Journal of Materials Research, 97, 5, 526, 532, May 2006, [Peer-reviewed], [Lead author]
English, Scientific journal

Mg-rich phase equilibria of Mg-Mn-Zn alloys analyzed by computational thermochemistry
M. Ohno, R. Schmid-Fetzer
Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques, 97, 5, 526, 532, May 2006, [Lead author]
Scientific journal

Controlling microstructure in magnesium alloys: A combined thermodynamic, experimental and simulation approach
Bernd Böttger, Janin Eiken, Munekazu Ohno, Gerald Klaus, Martin Fehlbier, Rainer Schmid-Fetzer, Ingo Steinbach, Andreas Bührig-Polaczek
Advanced Engineering Materials, 8, 4, 241, 247, Apr. 2006, [Peer-reviewed]
English, Scientific journal

Phase equilibria and solidification of Mg-rich Mg-Al-Zn alloys
M. Ohno, D. Mirkovic, R. Schmid-Fetzer
Materials Science and Engineering A, 421, 1-2, 328, 337, Apr. 2006, [Peer-reviewed], [Lead author]
English, Scientific journal

First-principles calculations of phase equilibria and transformation dynamics of Fe-based alloys
Tetsuo Mohri, Munekazu Ohno, Ying Chen
Journal of Phase Equilibria and Diffusion, 27, 1, 47, 53, Feb. 2006, [Peer-reviewed]
English, International conference proceedings

Aspects of quality assurance in a thermodynamic Mg alloy database
Rainer Schmid-Fetzer, Andreas Janz, Joachim Gröbner, Munekazu Ohno
Advanced Engineering Materials, 7, 12, 1142, 1149, Dec. 2005, [Peer-reviewed]
English, Scientific journal

Iteration calculation for path probability method with spin kinetics
M. Ohno
Physical Review B - Condensed Matter and Materials Physics, 72, 10, 104109, 01 Sep. 2005, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Thermodynamic assessment of Mg-Al-Mn phase equilibria, focusing on Mg-rich alloys
Munekazu Ohno, Rainer Schmid-Fetzer
Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques, 96, 8, 856, 869, Aug. 2005, [Peer-reviewed], [Lead author]
English, Scientific journal

Experimental investigation and thermodynamic calculation of binary Mg-Mn Phase equilibria
J. Gröbner, D. Mirkovic, M. Ohno, R. Schmid-Fetzer
Journal of Phase Equilibria and Diffusion, 26, 3, 234, 239, Jun. 2005, [Peer-reviewed]
English, Scientific journal

Relaxation kinetics of the long-range order parameter in a non-uniform system studied by the phase field method using the free energy obtained by the cluster variation method
Munekazu Ohno, Tetsuo Mohri
Philosophical Magazine, 83, 3, 315, 328, 21 Jan. 2003, [Peer-reviewed], [Lead author]
English, Scientific journal

Theoretical investigation of coarsening process of L10-ordered domain based on phase field method and cluster variation method
Munekazu Ohno, Tetsuo Mohri
Materials Transactions, 43, 9, 2189, 2192, Sep. 2002, [Peer-reviewed], [Lead author]
English, Scientific journal

Disorder-L10 transition investigated by phase field method with CVM local free energy
M. Ohno, T. Mohri
Materials Transactions, 42, 10, 2033, 2041, Oct. 2001, [Peer-reviewed], [Lead author]
English, Scientific journal

Phase field calculations with CVM free energy for a disorder-B2 transition
Munekazu Ohno, Tetsuo Mohri
Materials Science and Engineering A, 312, 1-2, 50, 56, 15 Aug. 2001, [Peer-reviewed], [Lead author]
English, Scientific journal

Transient behavior of a stress-strain curve within Cottrell-Stokes law
Tetsuya Shoji, Munekazu Ohno, Seiji Miura, Tetsuo Mohri
Materials Transactions, JIM, 40, 9, 875, 878, 1999, [Peer-reviewed]
English, Scientific journal

分子動力学シミュレーションによる急速凝固における過剰空孔形成の解析
矢澤智也, 澁田靖, 大野宗一, 日本金属学会講演大会(Web), 174th, 2024

分子動力学凝固計算に基づくphase-field法を用いたデータ同化による純金属の固液界面物性値の推定
神吉俊輔, 山村彩乃, 坂根慎治, 大野宗一, 澁田靖, 高木知弘, 日本金属学会講演大会(Web), 174th, 2024

凝固組織から固液界面物性値を予測する機械学習モデルの開発
坂井裕樹, 大野宗一, 日本金属学会講演大会(Web), 174th, 2024

Efficient and accurate data assimilation system for columnar dendrite growth
山村彩乃, 坂根慎治, 大野宗一, 安田秀幸, 高木知弘, 材料とプロセス(CD-ROM), 37, 1, 2024

Quantitative phase-field simulation of banded structure during rapid solidification
大野宗一, 材料とプロセス(CD-ROM), 37, 1, 2024

Al-Cu合金の急速凝固時におけるsolute trapping現象の分子動力学シミュレーション
小西渓太, 澁田靖, 大野宗一, 日本金属学会講演大会(Web), 175th, 2024

データ同化に基づいた凝固伝熱予測の高精度化および合金の熱伝導率の推定
淺川壌太, 棗千修, 大野宗一, 日本鋳造工学会全国講演大会講演概要集, 183rd, 2024

Machine learning model for prediction of concentration distribution from optical micrograph
大野宗一, 岡田航太, 山田亮, 材料とプロセス(CD-ROM), 37, 2, 2024

深層学習を用いた一次元拡散過程の逆問題解析
坪井政樹, 山田亮, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2022 (Web), 2023

非平衡溶質分配が伴う界面移動の定量的フェーズフィールド・モデリング
大野宗一, 日本金属学会講演大会(Web), 172nd, 2023

Inverse analysis of solid-liquid interface energy in Fe-Mn alloy using machine learning and phase-field method
大野宗一, 福澤颯太, 材料とプロセス(CD-ROM), 36, 1, 2023

炭素濃度勾配下におけるオーステナイト中のTiC成長挙動に関する数値解析
村田粋堂, 山田亮, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2023 (Web), 2023

Data Assimilation using Solid Fraction to Integrate Phase-field Simulation and X-ray Imaging for Columnar Dendrite Growth
山村彩乃, 坂根慎治, 大野宗一, 安田秀幸, 高木知弘, 計算工学講演会論文集(CD-ROM), 28, 2023

Al-Cu合金におけるsolute trapping現象の分子動力学シミュレーション
小西渓太, 大野宗一, 澁田靖, 日本金属学会講演大会(Web), 173rd, 2023

ミクロ偏析を用いたデータ同化による液相内拡散係数の推定
岡田航太, 山田亮, 大野宗一, 日本金属学会講演大会(Web), 173rd, 2023

Physics informed neural networkを用いた拡散過程の逆問題解析
坪井政樹, 山田亮, 大野宗一, 日本金属学会講演大会(Web), 173rd, 2023

局所平衡が破れた組織形成の定量的フェーズフィールド・モデリング
大野宗一, 日本金属学会講演大会(Web), 173rd, 2023

炭素濃度勾配下におけるγ相中のTiC粒子粗大化挙動のフェーズフィールド解析
村田粋堂, 山田亮, 大野宗一, 日本金属学会講演大会(Web), 173rd, 2023

Quantitative phase-field simulation of melting process of cold scrap iron
志賀壱太, 大野宗一, 服部雄大, 堤康一, 岸本康夫, 材料とプロセス(CD-ROM), 36, 2, 2023

格子ボルツマン法に基づくマクロ偏析モデルのベンチマーク計算による定量的評価
黒田悠斗, 棗千修, 大野宗一, 日本鋳造工学会全国講演大会講演概要集, 182nd, 2023

組織写真からミクロ偏析を推定する機械学習モデルの開発
岡田航太, 山田亮, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2023, 2023

純金属の急速凝固における過剰空孔形成の分子動力学シミュレーション
矢澤智也, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2023, 2023

Al-Cu合金における固液界面エネルギー及び異方性強度を予測する機械学習モデルの開発
坂井裕樹, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2023, 2023

データ同化に基づいた鋳造における流動推定
森口和人, 山田亮, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2021 (CD-ROM), 2022

核生成のフェーズフィールド・シミュレーションにおける熱揺らぎを模したノイズの制御
原口圭祐, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2021 (CD-ROM), 2022

データ科学による組織形成シミュレーションの高精度化及び高度化の試み
大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2021 (CD-ROM), 2022

包晶凝固鋼におけるマッシブ的変態に伴うミクロ偏析挙動の数値解析
阿波千寛, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2021 (CD-ROM), 2022

Parameter estimation for segregation simulations based on data assimilation
大野宗一, 材料とプロセス(CD-ROM), 35, 1, 2022

連続体cluster activation methodの開発と結晶粒成長への応用
山田亮, 大野宗一, 日本金属学会講演大会(Web), 170th, 2022

In-situ SEM-EBSD法による低合金鋼の異常粒成長における粒界方位差の解析
齊藤元貴, 張天龍, 坂口紀史, 大野宗一, 松浦清隆, 竹内正芳, 佐野太一, 山岡拓也, 日本金属学会講演大会(Web), 170th, 2022

鋳造・凝固における組織形成シミュレーションの高度化と高精度化
大野宗一, 日本金属学会講演大会(Web), 170th, 2022

Extracting grain boundary properties from polycrystalline grain growth based on data assimilation for molecular dynamics and phase-field methods
三好英輔, 大野宗一, 澁田靖, 山中晃徳, 高木知弘, マルチスケール材料力学シンポジウム講演論文集(CD-ROM), 7th, 2022

包晶凝固鋼のマッシブ的変態に伴うミクロ偏析挙動のシミュレーション解析
阿波千寛, 大野宗一, 日本金属学会講演大会(Web), 171st, 2022

ミクロ偏析から固液界面エネルギーの異方性強度を逆解析する機械学習モデルの開発
福澤颯太, 山田亮, 大野宗一, 日本金属学会講演大会(Web), 171st, 2022

粉末床溶融結合型金属Additive Manufacturingのデジタルツイン科学
小泉雄一郎, 奥川将行, 大野宗一, 澁田靖, 市川修平, 市川修平, 畑中修平, 日本金属学会講演大会(Web), 171st, 2022

データ同化に基づいた液相流動に関するパラメータ推定
森口和人, 山田亮, 大野宗一, 日本金属学会講演大会(Web), 171st, 2022

Prediction of solid-liquid interface properties in alloys based on machine learning
大野宗一, 結晶成長国内会議予稿集(CD-ROM), 51st, 2022

Testing an Abnormal Grain Growth Theory via Large-scale Phase-field simulations
三好英輔, 大野宗一, 澁田靖, 山中晃徳, 高木知弘, 日本機械学会計算力学講演会論文集(CD-ROM), 35th, 2022

ディープラーニングに基づいたミクロ偏析挙動からの界面エネルギー異方性強度の逆解析
福澤颯太, 山田亮, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2022 (Web), 2022

三次元等軸デンドライトの形態変化のシミュレーション解析
工藤幹央, 山田亮, 澁田靖, 高木知弘, 大野宗一, 日本金属学会講演大会(Web), 169th, 2021

fcc純金属の凝固における核生成挙動の分子動力学シミュレーション
平松大希, 大野宗一, 澁田靖, 高木知弘, 日本金属学会講演大会(Web), 169th, 2021

連続体cluster activation methodを用いた拡散時間スケールにおける合金凝固シミュレーション
山田亮, 大野宗一, 日本金属学会講演大会(Web), 169th, 2021

Evaluation of permeability for columnar dendrite with developed secondary arm by phase-field and lattice Boltzmann method
MITSUYAMA Yasumasa, SAKANE Shinji, OHNO Munekazu, SHIBUTA Yasushi, TAKAKI Tomohiro, The Proceedings of The Computational Mechanics Conference, 2021.34, 152, 2021
Permeability is a very essential parameter in simulations for predicting macrosegregation. In our previous study, we have developed the permeability prediction method using phase-field and lattice Boltzmann methods [Acta Mater. 164 (2019) 237-249, Acta Mater. 188 (2020) 282-287]. In this study, we evaluate the permeability for columnar dendrites with developed secondary arms by the phase-field and lattice Boltzmann methods. As a result, it is concluded that the dimensionless permeability for flow of normal and parallel directions are approximated by Kozeny-Carman equation except for regions with developed secondary arms., The Japan Society of Mechanical Engineers, Japanese

Investigation of phase-field data-assimilation system using results of thin-film in situ observation during binary alloy solidification
IMAI Yuki, SAKANE Shinji, OHNO Munekazu, YASUDA Hideyuki, TAKAKI Tomohiro, The Proceedings of The Computational Mechanics Conference, 2021.34, 029, 2021
Phase-field (PF) method is a powerful numerical model for predicting dendrite growth during solidification. Although some material properties are required to perform PF simulations, the lack of those properties, especially the interfacial properties such as interfacial energy and mobility, is a major issue in phase-field simulations. The ultimate goal of this series of studies is to develop a method that integrates the PF method and in-situ observation using data assimilation. Here, as a preliminary evaluation of the data assimilation using in-situ observation data, we investigate a data assimilation system for obtaining material properties using twin experiments of directional solidification of a binary alloy., The Japan Society of Mechanical Engineers, Japanese

Estimation of solid-liquid interfacial properties of pure Al by data assimilation using phase-field and MD methods
NAKAI Kenta, SAKANE Shinji, SHIBUTA Yasushi, OHNO Munekazu, TAKAKI Tomohiro, The Proceedings of The Computational Mechanics Conference, 2021.34, 028, 2021
Prediction and control of dendrite growth is crucial for material properties. Phase-field method is widely used for the prediction of dendrite growth. Although the phase-field simulation of dendrite growth needs interfacial properties such as solid-liquid interfacial energy, mobility and these anisotropies, there are no those values for almost all materials. In this study, we predict the interfacial properties of pure Al by data assimilation and phase-field simulations based on the observation data computed by molecular dynamics (MD) simulation. MD solidification simulations are conducted by LAMMPS with EAM potential of pure Al. The four interfacial properties of pure Al are predicted by the data assimilation with ensemble Kalman filter and multiple phase-field simulations., The Japan Society of Mechanical Engineers, Japanese

データ同化と凝固シミュレーションを用いた熱伝達係数の推定
及川 利彦, 佐藤 拓実, 棗 千修, 大野 宗一, 鋳造工学 全国講演大会講演概要集, 178, 66, 66, 2021
公益社団法人 日本鋳造工学会, Japanese

Application of Heat Transfer Coefficient Estimation Method using Data Assimilation and One-dimensional Solidification Simulation to Three-dimensional Problems
及川利彦, 佐藤拓実, 棗千修, 岡ゆきみ, 大野宗一, 材料とプロセス(CD-ROM), 34, 1, 2021

Prediction of Grain Size of Solidification Macrostructure using Data Assimilation and Cellular Automaton Method
佐藤拓実, 及川利彦, 棗千修, 岡ゆきみ, 大野宗一, 材料とプロセス(CD-ROM), 34, 1, 2021

純Alの凝固における核生成挙動の分子動力学シミュレーション
平松大希, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2020 (CD-ROM), 2021

Three-dimensional Simulations of Macrosegregation using flow calculation by Lattice Boltzmann Method
棗千修, 堀口智弘, 大野宗一, 材料とプロセス(CD-ROM), 34, 1, 2021

Estimation of solid-liquid interface properties in pure Fe by combining molecular dynamics and phase-field simulations using data assimilation
大野宗一, 岡ゆきみ, 坂根慎治, 澁田靖, 高木知弘, 材料とプロセス(CD-ROM), 34, 1, 2021

Permeability prediction of liquid flow in equiaxed dendritic structures by phase-field and lattice Boltzmann methods
高木知弘, 坂根慎治, 光山容正, 大野宗一, 澁田靖, 青木尊之, 材料とプロセス(CD-ROM), 34, 1, 2021

核生成のフェーズフィールド・シミュレーションにおけるノイズ制御
原口圭祐, 大野宗一, 日本金属学会講演大会(Web), 167th, 2020

不均一温度場における第二相粒子の粗大化挙動の解析
犬伏晴紀, 大野宗一, 日本金属学会講演大会(Web), 167th, 2020

三次元等軸デンドライト形態のスケーリング則のシミュレーション解析
工藤幹央, 澁田靖, 高木知弘, 大野宗一, 日本金属学会講演大会(Web), 167th, 2020

データ同化に基づいた純金属の凝固における固液界面物性値の推定方法の構築
岡ゆきみ, 高木知弘, 澁田靖, 大野宗一, 日本金属学会講演大会(Web), 166th, 2020

Analysis of microsegregation behavior at grain boundaries of columnar grains by phase-field simulations
大野宗一, 李在薫, 澁田靖, 高木知弘, 材料とプロセス(CD-ROM), 33, 1, 2020

Effect of cooling rate after hot forging on the fine precipitates and austenite grain structures in carburized Nb-added case-hardening steel
齊藤元貴, 坂口紀史, 大野宗一, 松浦清隆, 蓑口光樹, 山岡拓也, 材料とプロセス(CD-ROM), 33, 1, 2020

高温浸炭における肌焼鋼の異常粒成長発現機構の解明
辻莉緒, 齊藤元貴, 大野宗一, 松浦清隆, 竹内正芳, 蓑口光樹, 山岡拓也, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2019, 2020

フェーズフィールド・モデルによる凝固組織予測の高精度化
大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2019, 2020

Al-Cu合金における一次デンドライトアーム間隔の成長条件依存性
李在薫, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2019, 2020

Calculation Speed-Up performance of 3-D numerical simulation of Macrosegregation using Lattice Boltzmann method
堀口智弘, 棗千修, 大野宗一, 日本金属学会東北支部研究発表大会予稿集, 19th (CD-ROM), 2020

Influence of Heat Conduction on Estimation of Heat Transfer Coefficient between Sand Mold and Casting by Data Assimilation
及川利彦, 佐藤拓実, 棗千修, 岡ゆきみ, 大野宗一, 日本金属学会東北支部研究発表大会予稿集, 19th (CD-ROM), 2020

Evaluation of nucleation parameter of solidification structure simulation based on estimation by data assimilation
佐藤拓実, 及川利彦, 棗千修, 岡ゆきみ, 大野宗一, 日本金属学会東北支部研究発表大会予稿集, 19th (CD-ROM), 2020

High Performance Computing of Solidification Microstructures and Emergence of Cross-scale Approach
Ohno Munekazu, Shibuta Yasushi, Takaki Tomohiro, Materia Japan, 59, 3, 139, 144, 2020
The Japan Institute of Metals and Materials, Japanese

Development of Microstructure Simulation System in SIP-Materials Integration Projects
Koyama Toshiyuki, Ohno Munekazu, Yamanaka Akinori, Kasuya Tadashi, Tsukamoto Susumu, Materia Japan, 58, 9, 494, 497, 01 Sep. 2019
The Japan Institute of Metals and Materials, Japanese

Investigation of a method for estimating grain boundary properties by data assimilation with molecular dynamics method and phase-field method
福島拓実, 三好英輔, 高木知弘, 大野宗一, 澁田靖, 計算工学講演会論文集(CD-ROM), 24, 4p, May 2019
日本計算工学会, Japanese

Application of Double-obstacle Potential to Phase-field Model of Dendrite Growth with Motion
高木知弘, 坂根慎治, 大野宗一, 澁田靖, 計算工学講演会論文集(CD-ROM), 24, 4p, May 2019
日本計算工学会, Japanese

Multi-GPUs parallelization for phase-field simulations of dendrite growth applying an adaptive mesh refinement method
坂根慎治, 高木知弘, 大野宗一, 澁田靖, 青木尊之, 計算工学講演会論文集(CD-ROM), 24, 4p, May 2019
日本計算工学会, Japanese

Phase-field法による鋼の浸炭における異常粒成長のシミュレーション
木下誉久, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2018, 2019

Nb添加肌焼鋼のオーステナイト組織に及ぼす熱処理条件の影響
高野小春, 齊藤元貴, 徳永透子, 大野宗一, 松浦清隆, 佐野太一, 竹内正芳, 蓑口光樹, 山岡拓也, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2018, 2019

データ同化に基づく金属の凝固における固液界面物性値の推定
岡ゆきみ, 澁田靖, 高木知弘, 松浦清隆, 大野宗一, 材料とプロセス(CD-ROM), 32, 1, 2019

ばね鋼の逆変態におけるγ結晶方位のその場EBSD解析
中山知哉, 齊藤元貴, 大野宗一, 松浦清隆, 竹内正芳, 山岡拓也, 材料とプロセス(CD-ROM), 32, 1, 2019

析出粒子の不均一分布を考慮した浸炭中の異常粒成長のphase-fieldシミュレーション
木下誉久, 大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 32, 1, 2019

超大規模分子動力学法シミュレーションによる核生成・凝固・粒成長過程の統一的理解
澁田靖, 大喜多慎, 大野宗一, 三好英輔, 坂根慎治, 高木知弘, 材料とプロセス(CD-ROM), 32, 1, 2019

等軸晶形成のphase-fieldモデリングと2次元大規模シミュレーション
高木知弘, 坂根慎治, 佐藤遼太郎, 大野宗一, 澁田靖, 青木尊之, 材料とプロセス(CD-ROM), 32, 1, 2019

繰り返し変態によるばね鋼の結晶粒微細化における微細析出物の効果
齊藤元貴, 坂口紀史, 大野宗一, 松浦清隆, 蓑口光樹, 山岡拓也, 材料とプロセス(CD-ROM), 32, 1, 2019

Al-3mass%Cu合金における一次デンドライトアーム間隔の成長速度依存性の計算
LEE Jaehoon, 高木知弘, 澁田靖, 松浦清隆, 大野宗一, 日本金属学会講演概要(CD-ROM), 164th, 2019

優先成長方位の遷移に伴う一方向凝固組織の形態変化のフェーズフィールド・シミュレーション
金根佑, 高木知弘, 坂根慎治, 澁田靖, 松浦清隆, 大野宗一, 日本金属学会講演概要(CD-ROM), 164th, 2019

マルテンサイトからの逆変態γ粒形成挙動に及ぼす加熱速度の影響
齊藤元貴, 中山知哉, 坂口紀史, 大野宗一, 松浦清隆, 竹内正芳, 佐野太一, 蓑口光樹, 山岡拓也, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2019, 2019

不均一温度場における第二相粒子の粗大化挙動
犬伏晴紀, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2019, 2019

肌焼鋼の高温浸炭における異常粒成長の発現機構の調査
辻莉緒, 齊藤元貴, 徳永透子, 大野宗一, 松浦清隆, 佐野太一, 竹内正芳, 蓑口光樹, 山岡拓也, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2019, 2019

データ同化に基づいた固液界面エネルギーと液相内熱拡散率の同時推定
岡ゆきみ, 澁田靖, 高木知弘, 大野宗一, 材料とプロセス(CD-ROM), 32, 2, 2019

Nb添加肌焼鋼のオーステナイト異常粒成長に及ぼす加熱速度の影響
高野小春, 齊藤元貴, 徳永透子, 大野宗一, 松浦清隆, 佐野太一, 竹内正芳, 蓑口光樹, 山岡拓也, 材料とプロセス(CD-ROM), 32, 2, 2019

Nb添加肌焼鋼の高温浸炭中の異常粒成長
辻莉緒, 齊藤元貴, 徳永透子, 大野宗一, 松浦清隆, 山岡拓也, 材料とプロセス(CD-ROM), 32, 2, 2019

異形ダイス押出によるAl-Si合金の結晶粒微細化
徳永透子, 松浦清隆, 大野宗一, 軽金属学会大会講演概要, 136th, 2019

肌焼鋼の浸炭時におけるγ粒組織に及ぼす鍛造温度および添加元素濃度の影響
齊藤元貴, 坂口紀史, 大野宗一, 松浦清隆, 蓑口光樹, 山岡拓也, 材料とプロセス(CD-ROM), 32, 2, 2019

定量的フェーズフィールド法によるDP鋼板の組織形成予測
清兼直哉, 大野宗一, 山下孝子, 石川伸, 奥田金晴, 材料とプロセス(CD-ROM), 32, 2, 2019

不均一温度場における第二相粒子の粗大化挙動の解析
犬伏晴紀, 大野宗一, 日本金属学会講演大会(Web), 165th, 2019

柱状デンドライト構造に平行な流れの透過率予測
光山容正, 高木知弘, 坂根慎治, 澁田靖, 大野宗一, 日本金属学会講演大会(Web), 165th, 2019

Phase-field simulation of steel microstructure changes during welding process coupled with CCT diagram
SAKASHITA Shugo, KOYAMA Toshiyuki, TSUKADA Yuhki, OHNO Munekazu, YAMANAKA Akinori, The Proceedings of The Computational Mechanics Conference, 2019.32, 143, 2019
Continuous cooling transformation (CCT) diagram is useful for understanding phase transformations from austenite to ferrite, pearlite and bainite in steel. CCT diagram is also important to estimate and control the final microstructures produced by complex thermal cycle during welding process. In particular, a phase-field method has been applied to simulate the microstructure changes in the Heat-Affected Zone (HAZ) that is the area heated just below the melting point. In this study, we proposed an integrated microstructure simulation system which predicts the microstructure developments in HAZ by combining multi-phase-field method and CCT diagrams. This simulation system provides an efficient materials design framework that would be able to continue to grow even in the future. The output microstructure data calculated from the system will be expected to contribute accurate mechanical properties of welding steel., The Japan Society of Mechanical Engineers, Japanese

Multi-GPUs parallel computation for AMR phase-field simulation of dendrite growth with liquid flow and solid motion
坂根慎治, 高木知弘, 大野宗一, 澁田靖, 青木尊之, 日本機械学会計算力学講演会論文集(CD-ROM), 32nd, 024, 2019
In this study, an adaptive mesh refinement (AMR) method is applied to phase-field lattice Boltzmann simulation of the dendrite growth with liquid flow and solid motion. Furthermore, a parallel computation using multiple graphics processing units (GPUs) is implemented for the method. To evaluate computational efficiency of the multi-GPUs AMR method, the growth of dendrite settling in undercooled melt is simulated. As a result, it is confirmed that the phase-field lattice Boltzmann computation is efficiently accelerated by the multi-GPUs AMR method., The Japan Society of Mechanical Engineers, Japanese

Large-scale multi-phase-field simulation of grain growth with anisotropic grain boundary properties
三好英輔, 高木知弘, 大野宗一, 澁田靖, 坂根慎治, 青木尊之, 日本機械学会計算力学講演会論文集(CD-ROM), 32nd, 049, 2019
A lot of numerical studies have so far been conducted to systematically investigate the effects of anisotropic grain boundary properties on grain growth. Nevertheless, conclusive knowledge on the correlations between boundary properties and grain growth characteristics is not yet established, which is mainly due to insufficient statistics coming from the limited computer resources. In this study, by utilizing parallel graphics processing unit computing on a supercomputer, we perform large-scale simulations of anisotropic grain growth with more than three million initial grains. The multi-phase-field grain growth model is employed, enabling accurate and efficient treatment of grain growth. Misorientation-dependent anisotropies in grain boundary properties are introduced by simple models. Through a series of grain growth simulations with the misorientation-dependent properties, the anisotropy effects on the growth behaviors are elucidated in detail., The Japan Society of Mechanical Engineers, Japanese

多結晶粒成長における粒界物性の方位差依存性の影響:大規模phase-fieldシミュレーションによる解析
三好英輔, 高木知弘, 大野宗一, 澁田靖, 坂根慎治, 青木尊之, 日本材料学会学術講演会講演論文集, 68th, 2019

純Feにおける固液界面物性値の温度依存性の推定　　　　　　　　　　　　　　　
大野宗一, 岡ゆきみ, 高木知宏, 坂根慎治, 澁田靖, 日本学術振興会 製鋼第19委員会 凝固プロセス研究会、凝固プロセス研究会提出資料, 19委-12972, 凝固プロセス-VIII-53, 2019
Japanese, Lecture materials

2D PF-LBM simulations of polycrystalline dendritic solidification with liquid flow and solid motion
高木知弘, 佐藤遼太郎, 坂根慎治, 大野宗一, 澁田靖, 計算工学講演会論文集(CD-ROM), 23, 4p, Jun. 2018
日本計算工学会, Japanese

Multi-GPUs parallelization of phase-field simulation during binary alloy solidification with thermal-solutal convection
坂根慎治, 高木知弘, 大野宗一, 澁田靖, 青木尊之, 計算工学講演会論文集(CD-ROM), 23, 4p, Jun. 2018
日本計算工学会, Japanese

格子ボルツマン法に基づく連続鋳造のマクロ偏析シミュレーション
佐藤隼人, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2017, 2018

Sn-Cu共晶系合金における初晶の過剰晶出現象の解明
南洋乃, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2017, 2018

Ni被覆炭素繊維一方向配向型Fe基複合材料の熱伝導率評価
永松光明, 徳永透子, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2017, 2018

Cr添加SiAlONと耐熱合金のろう付け接合
徳永透子, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2017, 2018

大規模phase-field計算による多結晶二元合金一方向凝固過程の競合成長挙動評価
高木知弘, 坂根慎治, 大野宗一, 澁田靖, 青木尊之, 材料とプロセス(CD-ROM), 31, 1, 2018

A2024アルミニウム合金被覆AZ80マグネシウム合金薄板の作製とその特性調査
徳永透子, 外本和嗣, 大野宗一, 松浦清隆, 軽金属学会大会講演概要, 134th, 2018

分子動力学法からPhase-Field法へのダイレクトマッピングによる多結晶粒成長予測の高精度化
三好英輔, 高木知弘, 澁田靖, 大野宗一, マルチスケール材料力学シンポジウム講演論文集(CD-ROM), 3rd, 2018

ばね鋼の逆変態オーステナイト結晶粒組織に及ぼす事前熱処理の影響
田中由紀子, 齊藤元貴, 徳永透子, 大野宗一, 松浦清隆, 佐野太一, 竹内正芳, 蓑口光樹, 山岡拓也, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2018, 2018

Nb添加鋼の浸炭における異常粒成長のPhase-fieldシミュレーション
木下誉久, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2018, 2018

高Nb肌焼鋼のオーステナイト異常粒成長に及ぼす熱処理条件の影響
高野小春, 齊藤元貴, 徳永透子, 大野宗一, 松浦清隆, 竹内正芳, 佐野太一, 蓑口光樹, 山岡拓也, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2018, 2018

Nb添加肌焼鋼のオーステナイト異常粒成長に及ぼす熱処理条件の影響
高野小春, 齊藤元貴, 徳永透子, 大野宗一, 松浦清隆, 山岡拓也, 材料とプロセス(CD-ROM), 31, 2, 2018

Nb添加鋼の高温浸炭における異常粒成長のphase-fieldシミュレーション
木下誉久, 大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 31, 2, 2018

Phase-field法と格子ボルツマン法による柱状デンドライト垂直流れの透過率評価
高木知弘, 坂根慎治, 大野宗一, 澁田靖, 青木尊之, 材料とプロセス(CD-ROM), 31, 2, 2018

データ同化に基づいた金属の凝固における固液界面エネルギーの推定
岡ゆきみ, 澁田靖, 高木知弘, 大野宗一, 材料とプロセス(CD-ROM), 31, 2, 2018

格子ボルツマン法によるマクロ偏析シミュレーションの高速化と連続鋳造への応用
大野宗一, 佐藤隼人, 材料とプロセス(CD-ROM), 31, 2, 2018

粒子フィルタに基づく熱伝達係数の推定を導入した凝固解析による一方向鋳造実験の冷却曲線再現
棗千修, 内山涼介, 岡ゆきみ, 大野宗一, 材料とプロセス(CD-ROM), 31, 2, 2018

ばね鋼の逆変態γ組織に及ぼす予熱処理の影響
中山知哉, 齊藤元貴, 大野宗一, 松浦清隆, 竹内正芳, 佐野太一, 蓑口光樹, 山岡拓也, 材料とプロセス(CD-ROM), 31, 2, 2018

ばね鋼の繰り返し逆変態による結晶粒微細化における微細析出物の影響
齊藤元貴, 田中由紀子, 徳永透子, 大野宗一, 坂口紀史, 松浦清隆, 佐野太一, 竹内正芳, 蓑口光樹, 山岡拓也, 日本顕微鏡学会北海道支部学術講演会講演要旨集, 2018, 2018

ろう付けしたCr添加SiAlONと耐熱合金の接合強度調査
徳永透子, 松浦清隆, 大野宗一, 日本金属学会講演概要(CD-ROM), 162nd, 2018

Sn-Cu合金の初晶晶出量に及ぼすCu濃度と冷却速度の影響
南洋乃, 徳永透子, 松浦清隆, 大野宗一, 日本金属学会講演概要(CD-ROM), 163rd, 2018

2D phase-field lattice Boltzmann simulation of dendrite growth with fragmentation and motion
高木知弘, 坂根慎治, 佐藤遼太郎, 大野宗一, 澁田靖, 日本機械学会計算力学講演会論文集(CD-ROM), 31st, 327, 2018
Dendrite fragmentation is one of the most remarkable phenomena in solidification of alloys, because it would be potential nuclei of equiaxed structure. However, the mechanism of dendrite fragmentation is not clarified yet. In this study, a numerical model, which can simulate the dendrite fragmentation and following flow of a fragmented part, is developed by coupling phase-field method, lattice Boltzmann method and equations of motion. This model will be an effective prediction scheme of the dendrite fragmentation., The Japan Society of Mechanical Engineers, Japanese

Accuracy evaluation of grain growth simulations with different multi-phase-field models
三好英輔, 高木知弘, 大野宗一, 澁田靖, 日本機械学会計算力学講演会論文集(CD-ROM), 31st, 020, 2018
The multi-phase-field (MPF) method is widely employed in recent years as a prominent tool for simulating polycrystalline grain growth, since it enables us to handle complicated grain boundary migration without explicitly tracking the positions of grain boundaries. The MPF models are classified into two types according to the constraints for phase-field variables: one is the MPF model in a narrow sense; and the other is the continuum-field (CF) model. Both of these models are reported to allow for accurately simulating grain growth under uniform grain boundary energy and mobility. However, for the cases where the grain boundary properties exhibit large differences, the accuracies of the models are not yet examined in detail. In this study, using the MPF and CF models, systematic grain growth simulations with nonuniform grain boundary properties are performed. Through the detailed investigation on the accuracy of the simulated results, the applicable range of the models are revealed., The Japan Society of Mechanical Engineers, Japanese

Toward Elucidation of Dynamics in Solid-liquid Coexistence and Development of Technique for Controlling Segregation during Solidification
大野 宗一, 柳楽 知也, 棗 千修, 及川 勝成, 江阪 久雄, 大笹 憲一, 安田 秀幸, ふぇらむ = Bulletin of the Iron and Steel Institute of Japan : (一社)日本鉄鋼協会会報, 23, 10, 545, 551, 2018
日本鉄鋼協会, Japanese

Microstructure evolution in superplastic Al/Mg/Al clad sheet　　　　　　　　　　　　　　　
T. Tokunaga, K. Matsuura, M. Ohno, Proceedings of 16th Inter-national Conference on Aluminum Alloys (ICAA16), 2018, [Peer-reviewed]
English

データ同化に基づいた鋳造プロセス・シミュレーションのパラメータ推定と状態推定　　　　　　　　　　　　　　　
大野 宗一, 日本学術振興会 製鋼第19委員会 凝固プロセス研究会、凝固プロセス研究会提出資料, 19委-12926, 凝固プロセス-VIII-30, 2018
Japanese, Lecture materials

Grain-growth behavior in 2D cross sections analyzed by large-scale 3D multi-phase-field simulations
三好 英輔, 高木 知弘, 大野 宗一, 澁田 靖, 坂根 慎治, 下川辺 隆史, 青木 尊之, 計算工学講演会論文集 Proceedings of the Conference on Computational Engineering and Science, 22, 3p, May 2017
日本計算工学会, Japanese

Phase-field Simulation during Directional Solidification of Binary Alloy with Natural Convection
高木 知弘, 坂根 慎治, 大野 宗一, 澁田 靖, 下川辺 隆史, 青木 尊之, 計算工学講演会論文集 Proceedings of the Conference on Computational Engineering and Science, 22, 4p, May 2017
日本計算工学会, Japanese

架橋グラフェンナノリボンアレイのウェハースケール高集積化合成と光電子デバイス応用
鈴木弘朗, 金子俊郎, 澁田靖, 大野宗一, 前川侑毅, 加藤俊顕, 応用物理学会春季学術講演会講演予稿集(CD-ROM), 64th, ROMBUNNO.16p‐B6‐9, 01 Mar. 2017
Japanese

微細格子描画を用いたAl/Mg/Alクラッド薄板材の超塑性変形挙動調査
徳永透子, 松浦清隆, 大野宗一, 軽金属学会大会講演概要, 132nd, 2017

分子動力学法を用いたfcc金属の固液界面エネルギー異方性の算出
南洋乃, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2017, 2017

データ同化に基づく伝熱解析のパラメータ推定
岡ゆきみ, 大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 30, 1, 2017

粒成長停滞機構解明に向けた超大規模分子動力学法シミュレーション
大喜多慎, 澁田靖, 坂根慎治, 高木知弘, 大野宗一, 材料とプロセス(CD-ROM), 30, 2, 2017

分子動力学法を用いたfccモデル合金における固液界面エネルギーの算出
南洋乃, 大野宗一, 澁田靖, 高木知弘, 松浦清隆, 材料とプロセス(CD-ROM), 30, 2, 2017

アンサンブルカルマンフィルタを用いた伝熱解析におけるパラメータ推定
岡ゆきみ, 大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 30, 2, 2017

炭素繊維およびCNT一方向配向Cu基複合材料の熱伝導特性
紺谷博人, 紺谷博人, 徳永透子, 大野宗一, 松浦清隆, 粉体粉末冶金協会講演概要集, 2017, 2017

Fe-MnおよびAl-Cu合金のミクロ偏析に及ぼすデンドライト形態の影響
山下正義, 大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 30, 2, 2017

結晶の優先成長方位とデンドライト成長形態との関係
金根佑, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2017, 2017

炭素繊維一方向配向型Fe基複合材料の作製と熱伝導率評価
永松光明, 徳永透子, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2017, 2017

試料表面に描画した微小格子模様を用いたAl被覆Mg合金薄板の超塑性変形挙動の調査
徳永透子, 松浦清隆, 大野宗一, 日本金属学会講演概要(CD-ROM), 160th, 2017

炭素繊維配向制御Cu基複合材料の作製と熱伝導率評価
紺谷博人, 徳永透子, 大野宗一, 松浦清隆, 日本金属学会講演概要(CD-ROM), 160th, 2017

溶接プロセスにおける凝固・結晶粒成長のフェーズフィールド・モデリング
大野宗一, 日本金属学会講演概要(CD-ROM), 161st, 2017

炭素繊維一方向配向型Fe基複合材料作製と熱伝導率及び機械的特性の評価
永松光明, 徳永透子, 大野宗一, 松浦清隆, 日本金属学会講演概要(CD-ROM), 161st, 2017

優先成長方位遷移現象に伴う等軸デンドライト形態変化のシミュレーション
金根佑, 大野宗一, 松浦清隆, 日本金属学会講演概要(CD-ROM), 161st, 2017

熱間押出時に付加的な強加工を与えたAl-Si-Fe合金の高延性と高強度
酒向志乃, 徳永透子, 大野宗一, 松浦清隆, 日本金属学会講演概要(CD-ROM), 160th, 2017

Phase-field格子ボルツマン計算によるデンドライト一方向凝固組織に及ぼす自然対流の影響評価
高木知弘, 坂根慎治, 大野宗一, 澁田靖, 下川辺隆史, 青木尊之, 材料とプロセス(CD-ROM), 30, 1, 2017

断面観察からの立体的結晶粒組織の推定に関するPhase-Field法による研究
三好英輔, 高木知弘, 坂根慎治, 大野宗一, 澁田靖, 下川辺隆史, 青木尊之, 材料とプロセス(CD-ROM), 30, 2, 2017

3D大規模Phase-field格子ボルツマン計算によるデンドライト一方向凝固組織に及ぼす自然対流の影響評価
高木知弘, 坂根慎治, 大野宗一, 澁田靖, 下川辺隆史, 青木尊之, 材料とプロセス(CD-ROM), 30, 2, 2017

Multi-Phase-Field Grain Growth Simulations Starting from Molecular Dynamics-Generated Polycrystalline Structures
MIYOSHI Eisuke, TAKAKI Tomohiro, SHIBUTA Yasushi, OHNO Munekazu, The Proceedings of The Computational Mechanics Conference, 30th, 055, 2017
The Japan Society of Mechanical Engineers, Japanese

Phase-field models of dendrites: Past, current and future
Ohno Munekazu, The Proceedings of The Computational Mechanics Conference, 30th, 150, 2017
The Japan Society of Mechanical Engineers, Japanese

Large-scale phase-field simulations
Takaki Tomohiro, Ohno Munekazu, Shibuta Yasushi, Sakane Shinji, Miyoshi Eisuke, Shimokawabe Takashi, Aoki Takayuki, The Proceedings of The Computational Mechanics Conference, 30th, 331, 2017
The Japan Society of Mechanical Engineers, Japanese

Preface to the special issue entitled "dynamics in solid-liquid coexistence and controlling of segregation during solidification"
Munekazu Ohno, Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 103, 12, 667, 1, 2017
Japanese, Others

ミクロ偏析予測の高精度化とマクロ偏析シミュレーションへの拡張　　　　　　　　　　　　　　　
大野宗一, 山下正義, 木村大地, 松浦清隆, 日本学術振興会 製鋼第19委員会 凝固プロセス研究会、凝固プロセス研究会提出資料, 19委-12833 凝固プロセス-VIII-8., 2017
Japanese, Lecture materials

架橋グラフェンナノリボンアレイのウェハースケール高集積化合成
鈴木弘朗, 金子俊郎, 澁田靖, 大野宗一, 前川侑毅, 加藤俊顕, 応用物理学会秋季学術講演会講演予稿集(CD-ROM), 77th, ROMBUNNO.16a‐A33‐5, 01 Sep. 2016
Japanese

Development of permeability prediction method using phase-field and lattice Boltzmann methods
坂根 慎治, 高木 知弘, 大野 宗一, 澁田 靖, 下川辺 隆史, 青木 尊之, 計算工学講演会論文集 Proceedings of the Conference on Computational Engineering and Science, 21, 4p, May 2016
日本計算工学会, Japanese

データ同化に基づく鋳造プロセスにおける熱伝導率及び熱伝達係数の推定
岡ゆきみ, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2016, 2016

Al被覆Mg合金薄板の塑性変形挙動に及ぼす微細組織の影響
徳永透子, 松浦清隆, 大野宗一, 軽金属学会大会講演概要, 130th, 2016

亜共析鋼マルテンサイト組織から形成する逆変態オーステナイト粒のバリアント選択挙動
新妻勇哉, 大野宗一, 松浦清隆, 鈴木清一, 材料とプロセス(CD-ROM), 29, 1, 2016

大規模分子動力学法シミュレーションによる凝固組織生成過程の考察
澁田靖, 坂根慎治, 高木知弘, 大野宗一, 材料とプロセス(CD-ROM), 29, 1, 2016

繰返し熱間圧延によるAl合金とMg合金の多層クラッド材の作製と特性評価
嵯峨翔太, 松浦清隆, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2016, 2016

超大規模分子動力学法シミュレーションによる粒成長過程解析
大喜多慎, 澁田靖, 坂根慎治, 高木知弘, 大野宗一, 材料とプロセス(CD-ROM), 29, 2, 2016

ラスマルテンサイト組織から形成する塊状及び針状オーステナイト粒の結晶方位選択
新妻勇哉, 大野宗一, 松浦清隆, 鈴木清一, 材料とプロセス(CD-ROM), 29, 2, 2016

データ同化に基づく伝熱解析における熱伝導率および熱伝達係数の推定
岡ゆきみ, 大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 29, 2, 2016

大規模分子動力学から見る凝固組織生成
澁田靖, 大喜多慎, 坂根慎治, 高木知弘, 大野宗一, 材料とプロセス(CD-ROM), 29, 2, 2016

Deep Learningによるミクロ偏析予測モデルの開発
木村大地, 大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 29, 2, 2016

格子ボルツマン法に基づくマクロ偏析シミュレーションモデルの開発
佐藤隼人, 大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 29, 2, 2016

Al-Cu合金のミクロ偏析予測における解析次元の影響
山下正義, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2016, 2016

粉末冶金法を用いた炭素繊維配向Cu基複合材料の作製および熱伝導率評価
紺谷博人, 徳永透子, 大野宗一, 松浦清隆, 日本金属学会講演概要(CD-ROM), 159th, 2016

溶質添加によるFCC固溶体の固液界面エネルギー異方性の変化
奥田洋平, 大野宗一, 松浦清隆, 日本金属学会講演概要(CD-ROM), 159th, 2016

大規模phase-field計算による単結晶二元合金一方向凝固過程の一次枝配列挙動評価
高木知弘, 坂根慎治, 大野宗一, 澁田靖, 下川辺隆史, 青木尊之, 材料とプロセス(CD-ROM), 29, 1, 2016

Phase-field法と格子ボルツマン法の大規模計算によるデンドライト凝固組織の透過率評価法の構築
高木知弘, 坂根慎治, 大野宗一, 澁田靖, 下川辺隆史, 青木尊之, 材料とプロセス(CD-ROM), 29, 2, 2016

A study of ideal grain-growth process based on large-scale multi-phase-field simulations
MIYOSHI Eisuke, TAKAKI Tomohiro, SAKANE Shinji, OHNO Munekazu, SHIBUTA Yasushi, AOKI Takayuki, The Proceedings of The Computational Mechanics Conference, 29th, 4_221, 2016
The Japan Society of Mechanical Engineers, Japanese

Variational formulation of quantitative phase-field model
Ohno Munekazu, Takaki Tomohiro, Shibuta Yasushi, The Proceedings of The Computational Mechanics Conference, 29th, 4_133, 2016
The Japan Society of Mechanical Engineers, Japanese

Phase-field-lattice Boltzmann simulations of dendrite sedimentation
Sakane Shinji, Takaki Tomohiro, Ohno Munekazu, Shibuta Yasushi, Shimokawabe Takashi, Aoki Takayuki, The Proceedings of The Computational Mechanics Conference, 29th, 061, 2016
The Japan Society of Mechanical Engineers, Japanese

データ同化を利用した鋳造過程における熱物性値の算出　　　　　　　　　　　　　　　
大野宗一, 松浦清隆, 岡ゆきみ, 日本学術振興会 製鋼第19委員会 凝固プロセス研究会、凝固プロセス研究会提出資料、(2016), 19委-12808 凝固プロセス-VII-112, 2016
Japanese, Lecture materials

241 Large-scale phase-field lattice Boltzmann simulations of dendrite growth with melt convection
Takaki Tomohiro, Sakane Shinji, Rojas Roberto, Ohno Munekazu, Yasushi, Shimokawabe Takashi, Aoki Takayuki, The Computational Mechanics Conference, 2015, 28, "241, 1"-"241-2", 10 Oct. 2015
The Japan Society of Mechanical Engineers, Japanese

Large-scale 3D computations of Dendrite Growth in Convection by Phase-field Lattice Boltzmann method
坂根 慎治, 高木 知弘, 大野 宗一, 計算工学講演会論文集 Proceedings of the Conference on Computational Engineering and Science, 20, 5p, Jun. 2015
日本計算工学会, Japanese

炭素鋼における凝固モード遷移現象のフェーズフィールド解析
鶴田吉紀, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2015, 2015

亜共析鋼におけるマルテンサイト組織からの逆変態γ粒形成過程
新妻勇哉, 大野宗一, 松浦清隆, 鈴木清一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2015, 2015

Cu固溶体のデンドライト優先成長方位に及ぼすZn添加の影響
奥田洋平, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2015, 2015

炭素繊維配向制御Al-C系複合材料の作製と熱伝導率評価
高橋晃一, 松浦清隆, 大野宗一, 佐々木克彦, 今西輝光, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2015, 2015

炭素鋼における凝固モード遷移濃度域の解析
佐藤広章, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2014, 2015

0.2%炭素鋼鋳片に形成するδ-デンドライトとγ粒の結晶方位関係
大浦夏実, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2014, 2015

α-およびβ-SiAlON混合粉末のSPS焼結および特性調査
酒向はづき, 松浦清隆, 大野宗一, 黒川一哉, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2014, 2015

Phase-field法による多結晶二元合金のデンドライト競合成長シミュレーション
高木知弘, 坂根慎治, 大野宗一, 澁田靖, 材料とプロセス(CD-ROM), 28, 1, 2015

過冷融液からの核生成および凝固過程の大規模分子動力学法シミュレーション
澁田靖, 高木知弘, 坂根慎治, 大野宗一, 材料とプロセス(CD-ROM), 28, 2, 2015

人工ニューラルネットワークを用いたミクロ偏析モデルの開発
木村大地, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2015, 2015

炭素鋼における凝固モード遷移現象の凝固速度依存性
鶴田吉紀, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2015, 2015

粉末押出法による炭素繊維配向制御Al基複合材料の焼結性に及ぼすSi添加の影響
高橋晃一, 徳永透子, 大野宗一, 佐々木克彦, 松浦清隆, 今西輝光, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2015, 2015

炭素繊維配向制御による高熱伝導銅基複合材料の作製
紺谷博人, 松浦清隆, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2015, 2015

SiAlONと耐熱合金の接合に関する研究
越山将行, 徳永透子, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2015, 2015

固溶体のデンドライト優先成長方位に及ぼす溶質添加の影響
奥田洋平, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2015, 2015

Al被覆Mg合金クラッド薄板材の超塑性変形
徳永透子, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2015, 2015

熱間押出によるMg合金のAl被覆法における被覆厚さ制御因子の検討
徳永透子, 松浦清隆, 大野宗一, SZELIGA Danuta, PIETRZYK Maciej, 日本金属学会講演概要(CD-ROM), 156th, 2015

Cu固溶体合金におけるデンドライト優先成長方位のZn濃度依存性
奥田洋平, 大野宗一, 松浦清隆, 日本金属学会講演概要(CD-ROM), 157th, 2015

多穴式異形ダイスを用いた熱間押出によるAl-Si-Fe合金の高延性化
富田花帆, 徳永透子, 大野宗一, 松浦清隆, 日本金属学会講演概要(CD-ROM), 156th, 2015

二結晶二元合金におけるデンドライト競合成長の大規模3D phase-fieldシミュレーション
高木知弘, 坂根慎治, 大野宗一, 澁田靖, 下川辺隆史, 青木尊之, 材料とプロセス(CD-ROM), 28, 2, 2015

定量的Phase-Fieldモデルによる炭素鋼のδ→γ変態モード遷移現象の解析
佐藤 大祐, 大野 宗一, 松浦 清隆, 鋳造工学 全国講演大会講演概要集, 167, 11, 11, 2015
公益社団法人 日本鋳造工学会, Japanese

液相流動を伴うデンドライト成長の大規模phase-field lattice Boltzmannシミュレーション
高木知弘, 坂根慎治, ROJAS Roberto, 大野宗一, 澁田靖, 下川辺隆史, 青木尊之, 日本機械学会計算力学講演会論文集(CD-ROM), 28th, 2015

DUCTILITY IMPROVEMENT OF AL ALLOYS BY HETEROMORPHIC DIE EXTRUSION
Kiyotaka Matsuura, Toko Tokunaga, Munekazu Ohno, Kaho Tomita, M2D2015: PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON MECHANICS AND MATERIALS IN DESIGN, 2063, 2064, 2015, [Peer-reviewed]
English

Controlling of abnormal austenite grain growth in banded ferrite/pearlite steel by cold deformation
Xianguang Zhang, Kiyotaka Matsuura, Munekazu Ohno, Goro Miyamoto, Tadashi Furuhara, PTM 2015 - Proceedings of the International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2015, 33, 34, 2015, [Peer-reviewed]
English

一方向凝固におけるデンドライト成長方向の凝固条件及び合金濃度依存性　　　　　　　　　　　　　　　
大野宗一, 松浦清隆, 芳賀圭嗣, 奥田洋平, 日本学術振興会 製鋼第19委員会 凝固プロセス研究会、凝固プロセス研究会提出資料,19委-12762 凝固プロセス-VII-97., 2015
Japanese, Lecture materials

結晶粒成長のフェーズフィールド・シミュレーション
大野 宗一, 金属, 85, 11, 929, 934, 2015
アグネ技術センター, Japanese, Introduction scientific journal

Multi-GPU 3D Phase-field Simulations during Dendrite Competitive Growth
高木 知弘, 大野 宗一, 下川辺 隆史, 計算工学講演会論文集 Proceedings of the Conference on Computational Engineering and Science, 19, 3p, Jun. 2014
日本計算工学会, Japanese

0.2mass%C鋼における粗大柱状γ粒組織形成条件の解析
丸山正人, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2013, 2014

急冷凝固Al-Ni合金粉末押出材の機械的性質
西村祐亮, 松浦清隆, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2013, 2014

異形ダイスを用いた熱間押出によるアルミニウム合金の結晶粒微細化
富田花帆, 松浦清隆, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2013, 2014

TiC-TiB₂-Feサーメットの燃焼合成および表面へのCr拡散処理
ゲッツ厚沙洋, 松浦清隆, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2013, 2014

その場観察による亜共析鋼の逆変態γ粒形成過程の調査
星洋平, 大野宗一, 松浦清隆, 鈴木清一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2013, 2014

燃焼合成Y-α-SiAlONとCa-α-SiAlONのSPS焼結および特性調査
越山将行, 松浦清隆, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2014, 2014

0.2%炭素鋼の一方向凝固組織におけるδ-デンドライトとγ粒の結晶方位関係
大浦夏実, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2014, 2014

燃焼合成β-SiAlON粉末のSPS焼結および特性調査
酒向はづき, 松浦清隆, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2014, 2014

0.2%炭素鋼の一方向凝固組織におけるオーステナイト粒の結晶方位解析
大浦夏実, 大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 27, 1, 2014

定量的Phase-fieldモデルによる2次元デンドライト競合成長シミュレーション
堀井麻有, 高木知弘, 大野宗一, 材料とプロセス(CD-ROM), 27, 1, 2014

亜共析鋼の逆変態γ粒組織に対する初期組織及び加熱速度の影響
星洋平, 大野宗一, 松浦清隆, 鈴木清一, 材料とプロセス(CD-ROM), 27, 1, 2014

定量的phase-fieldモデルによる3次元一方向凝固シミュレーション
高木知弘, 大野宗一, 材料とプロセス(CD-ROM), 27, 1, 2014

0.2%炭素鋼鋳片に形成するオーステナイト粒の結晶方位解析
大浦夏実, 大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 27, 2, 2014

炭素鋼における凝固組織形成の定量的フェーズフィールド・シミュレーション
大野宗一, 材料とプロセス(CD-ROM), 27, 2, 2014

Phase-field法による一方向凝固過程における多結晶競合成長シミュレーション
高木知弘, 大野宗一, 材料とプロセス(CD-ROM), 27, 2, 2014

大規模分子動力学法シミュレーションの凝固分野への応用
澁田靖, 小口かなえ, 大野宗一, 材料とプロセス(CD-ROM), 27, 2, 2014

異形押出ダイスを用いた強加工によるAl-Cu系合金の結晶粒微細化
富田花帆, 松浦清隆, 大野宗一, 日本金属学会講演概要(CD-ROM), 154th, 2014

GPUスパコンTSUBAME2.5によるデンドライト一方向凝固のphase-fieldシミュレーション
高木知弘, 大野宗一, 下川辺隆史, 青木尊之, 日本機械学会計算力学講演会論文集(CD-ROM), 27th, 2014

Phase-field simulations of dendritic directional solidification by GPU supercomputer TSUBAME2.5
Takaki Tomohiro, Ohno Munekazu, Shimokawabe Takashi, Aoki Takayuki, The Proceedings of The Computational Mechanics Conference, 2014, 0, 583, 584, 2014
The Japan Society of Mechanical Engineers, Japanese

Advances in Phase-field Simulation of Solidification Microstructure
Ohno Munekazu, Materia Japan, 53, 10, 458, 461, 2014, [Peer-reviewed], [Invited]
The Japan Institute of Metals and Materials, Japanese, Introduction scientific journal

Analysis of Solidification Microstructure by Phase-Field Method
大野 宗一, ふぇらむ = Bulletin of the Iron and Steel Institute of Japan : (一社)日本鉄鋼協会会報, 19, 11, 758, 764, 2014, [Peer-reviewed], [Invited]
日本鉄鋼協会, Japanese, Introduction scientific journal

過包晶鋼における粗大柱状γ粒組織の形成臨界条件　　　　　　　　　　　　　　　
大野宗一, 松浦清隆, 丸山正人, 日本学術振興会 製鋼第19委員会 凝固プロセス研究会、凝固プロセス研究会提出資料、(2014), 19委-12674 凝固プロセス-VII-46, 2014
Japanese, Summary national conference

一方向凝固におけるデンドライト成長方向のフェーズフィールド・シミュレーション　　　　　　　　　　　　　　　
大野宗一, 松浦清隆, 芳賀圭嗣, 日本学術振興会 製鋼第19委員会 反応プロセス研究会、凝固プロセス研究会提出資料, 19委-12697 凝固プロセス, VII-56, 2014
Japanese, Lecture materials

Phase-field-lattice Boltzmann simulations of dendritic growth and motion in the isothermal solidification of binary alloys　　　　　　　　　　　　　　　
R. Rojas, T. Takaki, M. Ohno, Proceedings of 9th Pacific Rim International Conference on Modeling of Casting and Solidification Processes (MSCP 2014), 2014, [Peer-reviewed]
English

GPU accelerated phase-field simulations during dendrite competitive growth of binary alloy polycrystal　　　　　　　　　　　　　　　
T. Takaki, M. Ohno, T. Shimokawabe, T. Aoki, Proceedings of 9th Pacific Rim International Conference on Modeling of Casting and Solidification Processes (MSCP 2014), 2014, [Peer-reviewed]
English

Phase-field simulations of growth direction of directionally-solidified dendrites　　　　　　　　　　　　　　　
M. Ohno, K. Haga, T. Takaki, K. Matsuura, Proceedings of 9th Pacific Rim International Conference on Modeling of Casting and Solidification Processes (MSCP 2014), 2014, [Peer-reviewed]
English

1613 Two-dimensional simulations of dendritic competitive growth of Al-Cu alloy
Horii Mayu, Takaki Tomohiro, Ohno Munekazu, The Computational Mechanics Conference, 2013, 26, "1613, 1"-"1613-2", 02 Nov. 2013
The Japan Society of Mechanical Engineers, Japanese

炭素鋼におけるオーステナイトの粒界移動度とその炭素依存性
佐々木雄基, 大野宗一, 松浦清隆, 磯部浩一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2012, 2013

Ti添加した炭素鋼鋳片における逆変態オーステナイト粒組織の微細化
大西亘, 大野宗一, 松浦清隆, 磯部浩一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2012, 2013

SPSを利用したチタンの窒化物・ホウ化物被覆
林知宏, 松浦清隆, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2012, 2013

一方向凝固デンドライト競合成長の二次元phase-fieldシミュレーション
堀井麻有, 高木知弘, 大野宗一, 計算工学講演会論文集(CD-ROM), 18, 2013

一方向凝固における結晶成長方向と熱流方向の関係
芳賀圭嗣, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2013, 2013

Ti添加によるγ凝固鋼の鋳片組織微細化
佐藤広章, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2013, 2013

TiC-TiB₂-Fe系サーメットの燃焼合成
ゲッツ厚沙洋, 松浦清隆, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2013, 2013

0.1-0.75mass%炭素鋼の逆変態γ粒組織に対する初期組織及び加熱速度の影響
星洋平, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2013, 2013

包晶凝固鋼鋳片における粗大柱状γ粒と等軸γ粒組織形成の選択条件
大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 26, 1, 2013

Phase-fieldシミュレーションによる2次元デンドライト淘汰メカニズムの解明
高木知弘, 堀井麻有, 大野宗一, 材料とプロセス(CD-ROM), 26, 2, 2013

フェーズフィールド・シミュレーションによる一方向凝固中の結晶成長方向と熱流方向の関係
芳賀圭嗣, 大野宗一, 松浦清隆, 日本金属学会講演概要(CD-ROM), 153rd, 2013

アルミニウム被覆したマグネシウム合金薄板の超塑性変形
徳永透子, 松浦清隆, 大野宗一, 日本金属学会講演概要(CD-ROM), 153rd, 2013

GPUスパコンTSUBAMEによるデンドライト淘汰現象のphase-fieldシミュレーション
高木知弘, 下川辺隆史, 大野宗一, 山中晃徳, 青木尊之, 日本機械学会計算力学講演会論文集(CD-ROM), 26th, 2013

不連続粒成長による粗大柱状結晶粒形成過程のフェーズフィールドシミュレーション
大山晋平, 大野宗一, 松浦清隆, 日本機械学会計算力学講演会論文集(CD-ROM), 26th, 2013

Al-C系複合材料の作製と特性評価
山田重和, 松浦清隆, 大野宗一, 佐々木克彦, 垣辻篤, 片桐一彰, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2012, 2013

Effect of strain rate on the plastic strain gradient beneath the deformed surface of iron
Xianguang Zhang, Kiyotaka Matsuura, Munekazu Ohno, Journal of Physics: Conference Series, 419, 1, in print, 2013, [Peer-reviewed]
English

Al-Cu合金の2次元デンドライト競合成長シミュレーション
堀井麻有, 高木知弘, 大野宗一, 日本機械学会計算力学講演会論文集(CD-ROM), 26th, 2013

1601 Phase-field simulations of formation process of coarse columnar crystal grain structure by discontinuous grain growth
Ohyama Shimpei, Ohno Munekazu, Matsuura Kiyotaka, The Proceedings of The Computational Mechanics Conference, 2013, 26, _1601, 1_-_1601-2_, 2013
The Japan Society of Mechanical Engineers, Japanese

1614 Phase-field simulations of dendrite selection by GPU supercomputer TSUBAME
Takaki Tomohiro, Shimokawabe Takashi, Ohno Munekazu, Yamanaka Akinori, Aoki Takayuki, The Proceedings of The Computational Mechanics Conference, 2013, 0, _1614, 1_-_1614-2_, 2013
The Japan Society of Mechanical Engineers, Japanese

Phase - Field Model s for Solidification and Crystal Growt
OHNO Munekazu, nt. J. Microgravity Sci. Appl., 30, 1, 24, 29, 2013, [Peer-reviewed], [Invited]
Japanese, Introduction scientific journal

炭素鋼のδ/γ界面移動に対する分散粒子の効果　　　　　　　　　　　　　　　
佐藤大祐, 陳良, 大野宗一, 松浦清隆, 日本学術振興会 製鋼第19委員会 反応プロセス研究会、凝固プロセス研究会 、製鋼計測化学研究会提出資料, 19委-12658, 凝固プロセス-VII-30, 2013
Japanese

凝固におけるフェーズフィールド法の基礎と応用　　　　　　　　　　　　　　　
大野 宗一, 日本鉄鋼協会 計算工学による組織と特性予測技術II 研究会 最終報告書, 37, 46, 2013

炭素鋼の鋳片γ粒組織形成機構の解明
土屋真悟, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2011, 2012

炭素鋼のδ→γ変態界面移動速度に及ぼす分散粒子の影響に関するフェーズフィールドシミュレーション
佐藤大祐, 大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 25, 1, 2012

包晶凝固鋼の連鋳鋳片におけるγ粒径予測式の検討
大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 25, 1, 2012

多元系合金の非等温凝固を記述する定量的フェーズフィールド法の発展
大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 25, 2, 2012

0.2mass%炭素鋼における粗大柱状γ粒組織の形成条件
丸山正人, 大野宗一, 松浦清隆, 磯部浩一, 材料とプロセス(CD-ROM), 25, 2, 2012

炭素鋼のδ→γ変態界面移動速度に及ぼす第二相粒子分散状態の影響に関するフェーズフィールドシミュレーション
佐藤大祐, 大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 25, 2, 2012

0.2mass%C鋼における粗大柱状γ粒組織の形成条件
丸山正人, 大野宗一, 松浦清隆, 磯部浩一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2012, 2012

炭素鋼における逆変態γ粒組織に対する初期組織の影響
星洋平, 大野宗一, 松浦清隆, 磯部浩一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2012, 2012

急冷凝固Al基合金粉末の押出材の機械的性質
西村祐亮, 松浦清隆, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2012, 2012

放電プラズマ焼結法によるチタンのセラミックス被覆
林知宏, 松浦清隆, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2012, 2012

Ti添加鋼における逆変態オーステナイト粒組織に及ぼす繰り返し加熱の影響
大西亘, 大野宗一, 松浦清隆, 磯部浩一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2012, 2012

炭素鋼におけるオーステナイト粒成長と粒界移動度
佐々木雄基, 大野宗一, 松浦清隆, 磯部浩一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2012, 2012

Al-C系複合材料の作製と特性評価
山田重和, 松浦清隆, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2012, 2012

アルミニウム被覆マグネシウム合金薄板の引張特性
徳永透子, 松浦清隆, 大野宗一, 日本金属学会講演概要(CD-ROM), 150th, 2012

多元系合金におけるデンドライト成長の定量的フェーズフィールドモデル
大野宗一, 松浦清隆, 日本機械学会計算力学講演会論文集(CD-ROM), 25th, 2012

A review on mechanism and kinetics of peritectic phase transition in Fe-C alloy　　　　　　　　　　　　　　　
L. Chen, K. Matsuura, M. Ohno, D. Sato, Proceedings of Asia Steel International Conference, 2012
English

1103 Phase-field modeling of dendrite growth in multicomponent alloys
OHNO Munekazu, MATSUURA Kiyotaka, The Proceedings of The Computational Mechanics Conference, 2012, 25, 51, 52, 2012
The Japan Society of Mechanical Engineers, Japanese

An InAs nanowire spin transistor with subthreshold slope of 20mV/dec
Kanji Yoh, Z. Cui, K. Konishi, M. Ohno, K. Blekker, W. Prost, F. J. Tegude, J. C. Harmand, Device Research Conference - Conference Digest, DRC, 79, 80, 2012, [Peer-reviewed]
English

Structure control of austenite grains formed after peritectic and Ac3 transformation　　　　　　　　　　　　　　　
Kiyotaka Matsuura, Munekazu Ohno, Shingo Tsuchiya Liang Chen, Daisuke Sato, International Iron & Steel Symposium, April 2 – 4, 2012

フェーズフィールドシミュレーションによる連鋳鋳片γ粒の柱状粗大化過程の解析
大野宗一, 松浦清隆, 材料とプロセス(CD-ROM), 24, 1, 2011

タングステンフリー超硬合金の燃焼合成
松浦清隆, 大野宗一, 田中智紘, JUN Yu, 材料とプロセス(CD-ROM), 24, 1, 2011

過包晶鋼の鋳片γ粒組織に及ぼす炭素濃度の影響
土屋真悟, 大野宗一, 松浦清隆, 磯部浩一, 材料とプロセス(CD-ROM), 24, 1, 2011

包晶凝固及び共析逆変態のγ粒組織に及ぼすNb添加の影響
山口鉄矢, 大野宗一, 松浦清隆, 磯部浩一, 材料とプロセス(CD-ROM), 24, 1, 2011

炭素鋼の凝固後及び逆変態後のγ結晶粒組織に及ぼすV添加の影響
大西亘, 大野宗一, 松浦清隆, 磯部浩一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2011, 2011

分散粒子存在下における炭素鋼のd/γ界面移動挙動のフェーズフィールドシミュレーション
佐藤大祐, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2011, 2011

熱間押出法によるマグネシウム合金のアルミニウム被覆と材質調査
徳永透子, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2010, 2011

放電プラズマ焼結法によるチタンのTiC被覆
林知宏, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2010, 2011

アルミニウム被覆マグネシウム合金薄板の試作
徳永透子, 松浦清隆, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2011, 2011

アルミニウム被覆マグネシウム合金薄板作製とその材質調査
徳永透子, 松浦清隆, 大野宗一, 日本金属学会講演概要(CD-ROM), 149th, 2011

炭素鋼のδ/γ異相界面移動に及ぼすピン止め効果に関するフェーズフィールドシミュレーション
佐藤大祐, 大野宗一, 松浦清隆, 日本金属学会講演概要(CD-ROM), 149th, 2011

Pinning effect on migration of delta/gamma interface during peritectic transformation in Fe-C system　　　　　　　　　　　　　　　
L. Chen, K. Matsuura, D. Sato, M. Ohno, Proceedings of 11th Asian Foundry Congress, 233, 235, 2011
English

6-103 Introduction of Fundamental and Applied Exercises in Experiment on Materials Engineering
Ueda Mikito, Kikuchi Tatsuya, Ohno Munekazu, Proceedings of Annual Conference of Japanese Society for Engineering Education, 2011, 59, 110, 111, 2011
Japanese Society for Engineering Education, Japanese

2-325 Activation of Faculty Education by Combination of Quarter System and Practice
SUZUKI Ryosuke, OHTSUKA Toshiaki, YONEZAWA Tetsu, HAYASHI Shigenari, OHNO Munekazu, UEDA Mikito, Proceedings of Annual Conference of Japanese Society for Engineering Education, 2011, 59, 526, 527, 2011
工学教育研究講演会第59回年次大会（平成23年度）. 平成23年9月8日～平成23年9月10日. 北海道大学大学院工学研究院、北海道. セッションID: 2-325, Japanese Society for Engineering Education, Japanese

連続鋳造における粗大柱状γ粒組織の発達挙動と添加元素の影響　　　　　　　　　　　　　　　
松浦清隆, 大野宗一, 磯部浩一, 日本学術振興会 製鋼第19委員会 凝固プロセス研究会, 19委-12558, 凝固プロセス-VI-26, 2011
Japanese

過包晶鋼における初晶相の遷移と鋳片γ粒組織　　　　　　　　　　　　　　　
土屋真悟, 大野宗一, 松浦清隆, 日本学術振興会 製鋼第19委員会 凝固プロセス研究会, 19委-12575, 凝固プロセス-VI-30, 2011
Japanese

Combustion Synthesis of Functionally Graded Intermetallics
MATSUURA Kiyotaka, MIZUTA Naoki, OHNO Munekazu, Materials science and technology, 47, 4, 146, 151, 20 Aug. 2010, [Peer-reviewed]
日本材料科学会, Japanese

Phase-Field Method for Alloy Solidification
OHNO Munekazu, MATSUURA Kiyotaka, Journal of the Japan Society for Computational Engineering and Science, 15, 2, 2300, 2303, 30 Apr. 2010, [Peer-reviewed], [Invited]
日本計算工学会, Japanese, Introduction scientific journal

フェーズフィールド法における界面移動の記述 (特集 状態図と組織のコンピューターシミュレーション)
大野 宗一, 松浦 清隆, 金属, 80, 2, 99, 104, Feb. 2010, [Peer-reviewed], [Invited]
アグネ技術センター, Japanese, Introduction scientific journal

Ti添加鋼における逆変態オーステナイト粒組織の微細化挙動
村上ちひろ, 大野宗一, 松浦清隆, 磯部浩一, 材料とプロセス(CD-ROM), 23, 1, 2010

包晶鋼の凝固γ粒組織に及ぼすNb添加の影響
山口鉄矢, 大野宗一, 松浦清隆, 磯部浩一, 材料とプロセス(CD-ROM), 23, 1, 2010

0.2%炭素鋼鋳片における柱状γ結晶粒の形成機構
土屋真悟, 大野宗一, 松浦清隆, 磯部浩一, 材料とプロセス(CD-ROM), 23, 1, 2010

マイクロTIG溶接法を用いたNi表面へのアルミナイド被覆
大井川央, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2009, 2010

定量的フェーズ・フィールド・モデルによる炭素鋼の包晶反応過程の解析
大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2009, 2010

熱分析に基づく鋳鉄の黒鉛球状化率予測
伊藤利久, 松浦清隆, 大野宗一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2009, 2010

熱間押出法によるMg合金のAl被覆および被覆層厚さに対するダイス角の影響
野村光, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2009, 2010

軟鋼と溶融Mg合金の接合とその強度
石剣, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2010, 2010

Al-30%Ni合金粉末の放電プラズマ焼結
牛牧平, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2010, 2010

Combustion synthesis of titanium-based cemented carbides
Tomohiro Tanaka, Kiyotaka Matsuura, Keisuke Kojima, Munekazu Ohno, Materials Science Forum, 638-642, 1860, 1865, 2010, [Peer-reviewed]
English

合金凝固のフェーズフィールドモデル
大野宗一, 計算工学, 15, 2, 16, 16, 2010

フェーズフィールド法における界面移動の記述　　　　　　　　　　　　　　　
大野宗一, 松浦清隆, 金属, Vol.80, 2, 11, 16, 2010, [Peer-reviewed]

組成傾斜金属間化合物の合成
松浦清隆, 水田直気, 大野宗一, 材料の科学と工学, Vol. 47, No.4, 2, 7, 2010

定量的マルチフェーズフィールド法による包晶反応・包晶変態の可視化　　　　　　　　　　　　　　　
大野宗一, 松浦清隆, 日本学術振興会 製鋼第19委員会 凝固プロセス研究会, 19委-12489, 凝固プロセス-VI3, 2010
Japanese

包晶凝固鋼鋳片における粗大柱状γ粒の形成機構　　　　　　　　　　　　　　　
土屋真悟, 大野宗一, 松浦清隆, 磯部浩一, 日本学術振興会 製鋼第19委員会 凝固プロセス研究会, 19委-12492, 凝固プロセス-VI6, 2010
Japanese

凝固のフェーズフィールドモデル　　　　　　　　　　　　　　　
大野 宗一, 初心者のためのフェーズフィールド法講習会テキスト, 35, 41, 2010, [Invited]
Japanese, Lecture materials

材料組織の熱力学　　　　　　　　　　　　　　　
大野 宗一, 初心者のためのフェーズフィールド法講習会テキスト, 26, 34, 2010, [Invited]
Japanese, Lecture materials

Phase-field Simulation of Microstructural Evolution Process in Alloy System
OHNO Munekazu, Materia Japan, 48, 7, 375, 378, 01 Jul. 2009
The Japan Institute of Metals and Materials, Japanese

熱間押出法によるMg合金のAl被覆
野村光, 大野宗一, 松浦清隆, 日本金属学会講演概要, 145th, 2009

TiC基サーメットの鉄鋼の燃焼合成同時接合
田中智紘, 大野宗一, 松浦清隆, 日本金属学会講演概要, 145th, 2009

炭素鋼の逆変態オーステナイト粒径に及ぼすTi添加の影響
村上ちひろ, 大野宗一, 松浦清隆, 磯部浩一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2008, 2009

燃焼合成反応による高耐食性TiC基サーメットの製造とその特性評価
田中智紘, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2009, 2009

合金凝固過程の定量的フェーズ・フィールド・モデリング
大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2008, 2009

熱間押出法によるMg合金のAl被覆
野村光, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同サマーセッション概要集, 2009, 2009

過包晶炭素鋼の凝固オーステナイト組織に及ぼすCr添加の影響
土屋真悟, 大野宗一, 松浦清隆, 磯部浩一, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2008, 2009

遷移金属添加過共晶Al-Si合金粉末の放電プラズマ焼結と高温機械的性質
濱井拓也, 外山和宏, 大野宗一, 松浦清隆, 軽金属学会大会講演概要, 116th, 2009

遷移金属添加過共晶Al-Si合金粉末の放電プラズマ焼結と機械的性質
濱井拓也, 外山和宏, 大野宗一, 松浦清隆, 日本金属学会講演概要, 144th, 2009

遷移金属添加過共晶Al-Si合金粉末焼結材の微細組織と機械的性質
濱井拓也, 外山和宏, 大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2008, 2009

Order-disorder transition investigated by Phase Field Method
毛利哲雄, 藤橋直, 大野宗一, CHEN Ying, 日本機械学会計算力学講演会論文集(CD-ROM), 22nd, 2009

多相凝固過程の定量的フェーズ・フィールド・シミュレーション
大野宗一, 松浦清隆, 日本機械学会計算力学講演会論文集(CD-ROM), 22nd, 2009

First-principles approach to microstructural formation process　　　　　　　　　　　　　　　
T. Mohri, M. Ohno, Y. Chen, Proceedings of Asia Steel 2009, ed. Korean Institute of Metals and Materials, S13-02, 2009
English

1104 Quantitative phase-field simulation of multi-phase solidification process
OHNO Munekazu, MATSUURA Kiyotaka, The Proceedings of The Computational Mechanics Conference, 2009, 22, 45, 46, 2009
The Japan Society of Mechanical Engineers, Japanese

1116 Order-disorder transition investigated by Phase Field Method
Mohri Tetsuo, Fujihashi Nao, Ohno Munekazu, CHEN Ying, The Proceedings of The Computational Mechanics Conference, 2009, 22, 310, 311, 2009
Phase Field Method is combined with the Cluster Variation Method of statistical mechanics to investigate the microstructural evolution process from atomistic scale. Electronic structure total energy calculation is further performed to derive atomic interaction energies for Fe-based alloy systems and the time evolution of Anti Phase Boundary associated with order-disorder transition is calculated from the first-principles., The Japan Society of Mechanical Engineers, Japanese

Titanium Aluminide Coating on Titanium Surface Using 3-Dimensional Micro Welder　　　　　　　　　　　　　　　
Kiyotaka Matsuura, Munekazu Ohno, Proc. 1st Collaborative and Cooperative Symposoium between Harbin Engineering University and Hokkaido University, 17, 33, 2009

Fabrication of TiC-based cermets using SHS process　　　　　　　　　　　　　　　
Kiyotaka Matsuura, Munekazu Ohno, Tomohiro Tanaka, Proc. 1st Collaborative and Cooperative Symposoium between Harbin Engineering University and Hokkaido University, 34, 48, 2009

ピン止め相安定化によるγ粒成長抑制　　　　　　　　　　　　　　　
松浦清隆, 大野宗一, 磯部浩一, 日本学術振興会 製鋼第19委員会 凝固プロセス研究会, 2009
Japanese

TiC基サーメットの燃焼合成とその機械的特性
田中智紘, 大野宗一, 松浦清隆, 日本金属学会日本鉄鋼協会両支部合同夏季講演大会概要集, 2008, 2008

過包晶鋼の凝固γ結晶粒径に及ぼすチタン添加の影響
土屋真悟, 大野宗一, 松浦清隆, 磯部浩一, 日本金属学会日本鉄鋼協会両支部合同夏季講演大会概要集, 2008, 2008

Ti炭窒化物による炭素鋼フェライトデンドライトの柱状晶-等軸晶遷移
大野宗一, 松浦清隆, 磯部浩一, 日本金属学会日本鉄鋼協会両支部合同夏季講演大会概要集, 2008, 2008

Ti添加による炭素鋼の鋳造オーステナイト組織の等軸微細化
大野宗一, 松浦清隆, 日本鉄鋼協会日本金属学会両支部合同冬季講演大会概要集, 2007, 2008

Al-Si合金鋳造材の塑性加工による機械的性質の向上
外山和宏, 大野宗一, 松浦清隆, 日本鋳造工学会全国講演大会講演概要集, 153rd, 2008

Combustion synthesis of TiC-based cemented carbide composites from elemental powders and their microstructure control　　　　　　　　　　　　　　　
K. Kojima, K. Matsuura, T. Tanaka, K. Ohsasa, M. Ohno, Proceedins of The 5th International conference on advanced materials and processing, #, 2008
English

フェライト凝固の柱状晶－等軸晶遷移の検証と固相拡散を考慮した定量的フェーズ・フィールド・モデリング　　　　　　　　　　　　　　　
大野宗一, 松浦清隆, 磯部浩一, 日本学術振興会 製鋼第19委員会 凝固プロセス研究会, 2008
Japanese

First-principles calculations of phase stability, phase equilibria and phase transition in Fe-Ni, Fe-Pd and Fe-Pt systems
MOHRI Tetsuo, OHNO Munekazu, CHEN Ying, 日本応用磁気学会研究会資料, 146, 9, 16, 20 Feb. 2006
Japanese

マルチスケール計算の為の時空粗視化
毛利哲雄, 大野宗一, 陳迎, 日本金属学会講演概要, 138th, 2006

Quantitative understanding and Modeling of Microstructural Formation by Solidification Technique of Magnesium Alloys　　　　　　　　　　　　　　　
G. Klaus, B. Boettger, J. Eiken, A. Buhring-Polaczek, I. Steinbach, M. Ohno, J. Groebner, R. Schmid-Fetzer, Proceedings of the 7th Int. Conference on Magnesium Alloys and their Applications 2006, 1021, 1026, 2006
English

Finite-temperature thermodynamic properties of intermetallics in the Mg-Ca-Sn system via first-principles methods
Raymundo Arroyave, Munekazu Ohno, Rainer Schmid-Fetzer, Zi Kui Liu, Magnesium Technology, 2006, 429, 434, 2006
English

On liquidus and solidus temperatures in AZ and AM alloys
Munekazu Ohno, Djordie Mirkovic, Rainer Schmid-Fetzer, Magnesium Technology, 2006, 129, 132, 2006
English

Fe-Pt系のL1₀規則相形成過程の第一原理計算
毛利哲雄, 大野宗一, 陳迎, 日本金属学会講演概要, 137th, 2005

Ordering process analyzed by phase field method, CVM and PPM
M Ohno, T Mohri, COMPLEX INORGANIC SOLIDS: STRUCTURAL, STABILITY, AND MAGNETIC PROPERTIES OF ALLOYS, 187, 202, 2005
English

First-principles calculation of ordering phase transition
Tetsuo Mohri, Munekazu Ohno, Ying Chen, Proceedings of an International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005, 2, 633, 650, 2005
English

Towards the first-principles investigation of ordering dynamics
T Mohri, M Ohno, Y Chen, PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5, 475-479, 3075, 3080, 2005, [Peer-reviewed]
English

Hybridization of Phase Field and Cluster Variation Methods toward First-Principles Calculation of Microstructural Process
OHNO Munekazu, CHIN Ying, MOHRI Tetsuo, Journal of the Society of Mechanical Engineers, 108, 1043, 798, 801, 2005, [Peer-reviewed], [Invited]
The Japan Society of Mechanical Engineers, Japanese, Introduction scientific journal

マルチスケールシミュレーションに関する粗視化の問題　　　　　　　　　　　　　　　
毛利哲雄, 大野宗一, 陳迎, 日本学術振興会 合金状態図第172委員会研究報告書, 5, 2, 45, 49, 2005
Japanese

First principle calculations of phase stability, equilibria and transformation dynamics　　　　　　　　　　　　　　　
T. Mohri, M. Ohno, Y. Chen, Proceedings of the 12th National Symposium on Phase Diagram, Materials Design and their Applications, 1, 4, 2004
English

Theoretical calculation of ordering process based on TDGL equation and CVM　　　　　　　　　　　　　　　
M. Ohno, T. Mohri, Proceedings of the 15th International Symposium on Transport Phenomena, 420, 425, 2004
English

Kinetic calculation of L10 ordered system based on Phase Field Method and Cluster Variation Method
M. Ohno, T. Mohri, Materials Research Society Symposium - Proceedings, 753, 411, 416, 2003
English

組織形成過程の理論研究
大野 宗一, まてりあ : 日本金属学会会報, 41, 10, 725, 725, 20 Oct. 2002, [Peer-reviewed], [Invited]
Japanese, Report scientific journal

CVM及びPhase Field Simulationによる長範囲規則度の緩和挙動
大野宗一, 毛利哲雄, 日本金属学会講演概要, 130th, 2002

PPM及びCVMとPhase Field法の混成手法による緩和挙動の解析
大野宗一, 毛利哲雄, 日本金属学会講演概要, 131st, 2002

原子の挙動と内部組織の形成の理論計算 (ミニ特集「相分解研究の最前線」)
大野 宗一, 毛利 哲雄, ふぇらむ, 6, 10, 766, 772, 2001, [Peer-reviewed], [Invited]
日本鉄鋼協会, Japanese, Introduction scientific journal

原子レベルからの内部組織の計算
大野宗一, 毛利哲雄, “相分解による組織形成過程の研究最前線”, 日本鉄鋼協会, 材料の組織と特性部会,, 95, 106, 2001, [Lead author]
Japanese

応力-歪み曲線の計算とCottrell-Stokesの法則
庄司哲也, 大野宗一, 三浦誠司, 毛利哲雄, 日本金属学会講演概要, 124th, 1999

Computational Materials Science　　　　　　　　　　　　　　　
Hokkaido University
2022 - Present

材料工学演習IV　　　　　　　　　　　　　　　
北海道大学 工学部
Present

弾塑性学　　　　　　　　　　　　　　　
北海道大学 工学部
Present

材料組織学　　　　　　　　　　　　　　　
北海道大学 工学部
Present

Microstructure Designing of Metal Materials　　　　　　　　　　　　　　　
Hokkaido University
2019 - 2021

Materials' design　　　　　　　　　　　　　　　
Hokkaido University
2019 - 2020

創造工学実験　　　　　　　　　　　　　　　
北海道大学

工学的創成実験I　　　　　　　　　　　　　　　
北海道大学

Advanced Multidisciplinary Materials　　　　　　　　　　　　　　　
北海道大学 大学院工学研究科

コンピュータ演習　　　　　　　　　　　　　　　
北海道大学 工学部

材料工学実験II　　　　　　　　　　　　　　　
北海道大学 工学部

材料工学実験I　　　　　　　　　　　　　　　
北海道大学 工学部

材料科学基礎英語　　　　　　　　　　　　　　　
北海道大学 工学部

近未来社会とマテリアル工学の夢　　　　　　　　　　　　　　　
北海道大学

多元材料学特論　　　　　　　　　　　　　　　
北海道大学 大学院工学研究院

材料相変態特論　　　　　　　　　　　　　　　
北海道大学 大学院工学研究院

Present
The Japan Society of Mechanical Engineers　　　　　　　　　　　　　　　

Present
The Iron and Steel Institute of Japan　　　　　　　　　　　　　　　

Present
The Japan Society of Applied Physics　　　　　　　　　　　　　　　

Present
Materials Research Society　　　　　　　　　　　　　　　

Present
The Japan Institute of Metals　　　　　　　　　　　　　　　

Present
The Minerals Metals and Materials Society(TMS)　　　　　　　　　　　　　　　

Present
ASM International　　　　　　　　　　　　　　　

Theoretical modeling of microstructural evolution driven by interface dynamics without local equilibrium
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
01 Apr. 2022 - 31 Mar. 2026
大野 宗一, 澁田 靖
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 22H00252

Simulation of nucleation based on Bayesian inference and surrogate modeling
Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)
30 Jun. 2022 - 31 Mar. 2025
大野 宗一
Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Research (Exploratory), Hokkaido University, 22K18875

Development of advanced simulator for solidification microstructure prediction and its application to integration technology of simulation and experiment
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
01 Apr. 2020 - 31 Mar. 2023
高木 知弘, 坂根 慎治, 大野 宗一, 安田 秀幸, 青木 尊之
フェーズフィールド法によるデンドライト凝固の大規模高速計算を可能とするために，固液界面近傍にのみ細かい格子を用いる適合細分化格子法(AMR)の複数GPU実装を行った．ここで，各GPUの計算負荷を均一化するために動的負荷分散を適用した．また，大きな格子を用いた計算を可能とするために，プリコンディショニングを導入した．このAMR技術開発によって，一次枝間隔の広いデンドライト成長問題も効率的に計算可能となった．
ダブルオブスタクルポテンシャルを用いたマルチフェーズフィールド法と二緩和時間モデルを用いた格子ボルツマン法を連成させることで，固液共存域変形のシミュレーションを可能とした．また，このモデルの複数GPU実装を行い，大規模シミュレーションを可能とした．さらに，これを用いた様々な固液共存域のせん断変形シミュレーションを系統的に行い，粒形状，固相率，変形速度などが固液共存域変形挙動に及ぼす影響を詳細に評価した．
GPUスパコンを用いた大規模フェーズフィールド計算によって，優先成長方向が熱流方向から傾いた柱状デンドライトの一方向凝固計算を系統的に行い，その配列を評価した．この結果，傾いたデンドライトでも六角形配列が支配的となることを明らかにした．この結果を用いて，デンドライト樹間液相流動の透過率評価を行い，無次元透過率はおおむねKozeny-Carmanの式によって表現可能であることを示した．
一方向凝固時に成長する柱状デンドライトのデータ同化を効率化するために，デンドライト先端近傍のみを用いるデータ同化を考案し実装した．また，液相流動と固体運動を伴う単一デンドライト成長問題に対するデータ同化システムを開発し，双子実験によってその妥当性を確認した．さらに，多結晶粒成長において多数粒界のエネルギーとモビリティを同時推定可能なデータ同化システムを開発し，双子実験を通してその有用性を示した．
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Kyoto Institute of Technology, Coinvestigator, 20H00217

Interfacial properties out of equilibrium estimated based on data assimilation of atomistic and microstructural approaches
Grants-in-Aid for Scientific Research
01 Apr. 2019 - 31 Mar. 2022
Ohno Munekazu
Solid-liquid interfacial free energy and mobilities are important quantities that determine solidification microstructures in metallic materials. However, it is currently not possible to obtain these quantities in non-equilibrium states and a method for computing them needs to be developed. In this study, the method for computing the interfacial properties were developed by combining atomistic simulations, microstructural simulations and data assimilation techniques.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, Principal investigator, Competitive research funding, 19H02486

Development of inverse design approach for microstructural processes in materials based on diffusive solution method
Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)
30 Jun. 2017 - 31 Mar. 2020
Ohno Munekazu
In this study, a method called diffusive solution method is developed for calculatinig time reversal processes of diffusion equation. This method is intended to be applied to the time reversal process of microstructure simulations to obtain past evolution process of microstructure and initial state from the final microstructure. The diffusive solution method makes it possible to calculate the time reversal process of certain diffusion problems while suppressing the increase of the short wavelength component of the concentration profile (wave). Further improvement is required for more accurate analysis.
Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Research (Exploratory), Hokkaido University, 17K18965

Development of innovative prediction method of material microstructure by quantitative coupling of large-scale simulation and in situ observation
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
01 Apr. 2017 - 31 Mar. 2020
Takaki Tomohiro
In material development, accurate prediction and control of material microstructures are extremely important. In this study, we tried to construct an innovative mesoscale material structure prediction approach by combining three cutting-edge researches of phase-field (PF) simulation, in-situ observation by SPring-8, and molecular dynamics (MD) simulation through data science. We successfully developed the data assimilation to calculate the interfacial physical properties by PF and EnKF using the MD results as observation data. Moreover, to obtain the material physical properties and field information, we constructed a frame of data assimilation by PF and EnKF using the results of SPring-8 in-situ observation as observation data. In addition, we constructed the high-performance PF simulation schemes and performed large-scale PF simulations for solidification and grain growth to predict the material microstructures and clarify important mechanisms in microstructure formation process.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Kyoto Institute of Technology, Coinvestigator, 17H01237

Very large scale molecular dynamics simulations for revealing and controlling of microstructure formation of alloys
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
01 Apr. 2016 - 31 Mar. 2019
Shibuta Yasushi
In this study, complex dynamics in nucleation, solidification and grain growth is studied to understand key factors on microstructure formation of alloy systems from atomistic viewpoint for the better control of microstructure in alloy products with a high degree of accuracy. Practically, unique atomistic pictures in nucleation (e.g., heterogeneity in homogeneous nucleation), which are not conceived by conventional classical nucleation theory, are revealed based on billion-atom MD simulation. In addition, deviation from parabolic low during the grain growth is discussed focusing on geometric factor, mobility and energy of grain boundary. Moreover, the solute partition at the solid-liquid interface is examined for interatomic potentials for alloy system for further large-scale MD simulation for alloy system.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), The University of Tokyo, Coinvestigator, 16H04490

Novel anisotropic behavior of solid-liquid interfacial property and the related microstructure control
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
01 Apr. 2016 - 31 Mar. 2019
Ohno Munekazu, Okuda Yohei, Minami Hirono, Kim Geunwoo
In this study it was elucidated by means of solidification experiments that solidification in several alloy systems involves orientation transition phenomena where preferential growth direction of crystal depends on the alloy concentration. The thermodynamic analysis and atomistic simulations were carried out to understand the mechanism. The phase-field model for describing this phenomenon was developed and utilized for constructing orientation selection map by which one can understand a versatility of dendrite morphology associated with the transition phenomenon.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, Principal investigator, Competitive research funding, 16H04541

フェーズフィールド法を核とする凝固組織形成予測モジュールの開発　　　　　　　　　　　　　　　
SIP 受託研究
Oct. 2014 - Mar. 2019
大野 宗一
独立行政法人科学技術振興機構(JST), Principal investigator, Competitive research funding

格子ボルツマン法に基づく流動・凝固シミュレーション・モデルの開発　　　　　　　　　　　　　　　
第25回 鉄鋼研究振興助成
Apr. 2016 - Mar. 2018
大野 宗一
日本鉄鋼協会, Principal investigator, Competitive research funding

固液共存体の挙動制御によるマクロ偏析低減　　　　　　　　　　　　　　　
研究会I
Apr. 2014 - Mar. 2017
大野 宗一
日本鉄鋼協会, Principal investigator, Competitive research funding

A controlling method of microsegregation based on tie-line shift phenomenon during solidification in multi-component alloys
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
01 Apr. 2013 - 31 Mar. 2016
Ohno Munekazu, SHIBUTA Yasushi
In cast materials, non-uniform distribution of the elements exists on a micro-meter scale, which is called the microsegregation. The microsegregation needs to be precisely controlled for production of cast materials with high quality. In this study, effects of tie-line shift phenomenon involved in multi-component diffusion on the microsegregation were investigated in detail. It was found that the microsegregation of the slow diffusing element can be reduced by utilizing the tie-line shift.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, Principal investigator, Competitive research funding, 25289266

包晶凝固鋼における優先成長相遷移条件の高精度解析に基づくγ粒組織制御法の開拓　　　　　　　　　　　　　　　
第22回 鉄鋼研究振興助成
2013 - 2015
大野 宗一
日本鉄鋼協会, Principal investigator, Competitive research funding

鋼の包晶凝固、γ粒成長に関する研究　　　　　　　　　　　　　　　
製鋼第19委員会テーマ応募式研究助成
2011 - 2013
大野 宗一
日本学術振興会, Principal investigator, Competitive research funding

Development of ultra-fine grained steels by controlling peritectic and inverse eutectoid reaction processes
Grants-in-Aid for Scientific Research
2010 - 2013
OHNO Munekazu
The purpose of this study is to obtain carbon steels exhibiting very fine austenite grain structures by controlling solidification and heat treatment conditions without the deformation processes. Effects of Ti, V, and Nb additions, different cooling and heating conditions on the grain structure were investigated in detail by means of the theories, simulations and experiments to elucidate optimal conditions for the grain refinement. It was found that the carbon steel with Ti addition fabricated by permanent mold casting followed by rapid heating process exhibits very fine grain structure, the average size of which is as small as about 1 micron.
Japan Society for the Promotion of Science, Grant-in-Aid for Young Scientists (A), Hokkaido University, Principal investigator, Competitive research funding, 22686067

Spin blockade from spin channel to quantum dots and its application to qubit
Grants-in-Aid for Scientific Research
Apr. 2008 - Mar. 2011
YOH Kanji, SUEOKA Kazuhisa, NAKAZATO Hiromichi
We have investigated surface reaction of Fe electrode and InAs substrate by thermodynamic calculation. We have fabricated a spin transistors with Fe electrode and verified current oscillation which agreed well with theoretical calculation. We have also fabricated an InAs nanowire spin transistor based on Au colloid and observed current oscillation which is presumably originates from spin-orbit interaction. In a spintransistor/quantum dot hybrid structure, we have theoretically demonstrated that spin polarization of 40% would be hard to verify quantum entanglement, but it would be appreciably large signal with 60% spin polarization and clear entanglement would be observable with 80% spin polarization in the spin channel.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, Competitive research funding, 20241033

自己伝播合成反応プロセスにおける微細組織の予測シミュレーション法の考案
科学研究補助金・挑戦的萌芽
2009 - 2011
大野 宗一
純物質や合金の粉末を混合し、ある温度まで加熱すると、粉末間で化合物の合成反応が生じ、その合成反応に伴う生成熱が未反応粉末間の反応を促進することで反応が連鎖的に伝播して瞬時に生成物が作製される。この反応は自己伝播燃焼合成(SHS)と呼ばれ、新規化合物の製造や、低コスト・低エネルギーの材料製造法としての発展が期待されている。しかしながら、SHS法で得られる生成物における微細組織の形成機構は詳細に明らかになっておらず、組織の形態・サイズをコントロールできるに至っていない。本研究では、SHS反応プロセスにおける微細組織の経時変化を予測するシミュレーション法を考案・確立することを目的とする。平成21年度に、多相凝固過程を定量的にシミュレートするフェーズフィールドモデルを発展させ(Acta Mater 2010)、SHS反応後、溶融状態からの組織形成過程を記述することを可能にした。本年度は、フェーズフィールド法と熱伝導方程式をカップリングし、SHSの反応伝播過程の解析を試みた。Ti、C、Feの純金属粉末からFeをバインダーとするTiC/Fe系サーメットが形成するプロセスを対象とした。取り扱いを簡略化するため、Fe-TiC擬二元系を仮定し、さらに相境界線の形状に関する簡略化を行った。本計算により発熱、溶融、凝固過程の伝播が記述され、潜熱や熱伝導率とった物性値の変化に伴う伝播挙動の変化を調査した。特に、伝播過程における温度、溶質濃度の不均一パターンを解析することを可能にした。他本計算における熱力学量(自由エネルギー)をより高度なモデルで記述することで、現実の系の解析が可能となる。ただし、本計算においては、粉末境界における拡散現象を有効拡散係数という形で考慮している。外圧に伴う粉末の移動や粉末界面における諸現象の記述が、今後と課題として残る。
日本学術振興会, 挑戦的萌芽研究, 北海道大学, Principal investigator, Competitive research funding, 21656192

鋳造凝固における柱状オーステナイト粒組織の形成機構の解明　　　　　　　　　　　　　　　
第18回 鉄鋼研究振興助成
2009 - 2011
大野 宗一
日本鉄鋼協会, Principal investigator, Competitive research funding

製鋼第19委員会 若手研究奨励金
2009 - 2010
大野 宗一
日本学術振興会, Principal investigator, Competitive research funding

スピントロニクスデバイス材料の高精度熱化学計算　　　　　　　　　　　　　　　
科学研究補助金・若手研究(B)
2007 - 2009
大野 宗一
日本学術振興会, Principal investigator, Competitive research funding

半導体上のスピネル型ハーフメタルの成長と高偏極率スピン注入の実証
科学研究費助成事業 特定領域研究
2008 - 2008
陽 完治, 大野 宗一
インジウム砒素基板上に200Å成長させたマグネタイト薄膜の磁化特性を超伝導磁束量子干渉計(SQUID)を用いて測定した. マグネタイト薄膜の磁化容易軸方向に外部磁場を印加した場合, 0.4T付近で磁化が飽和し, その値は483emu/ccであった. この値はバルクのマグネタイトのそれと近い値である. 一方, マグネタイト薄膜の磁化容易軸方向と垂直な外部磁場を印加した場合, 飽和し始めたのは1T付近であった. またマグネタイトの抵抗の温度依存性を測定するために, シリコン酸化膜上にマグネタイト薄膜100Åを成長させた. 成長温度は300℃, 酸素分圧は7.5×10-7Torr, 成長レートは約100Å/hour成長したマグネタイト薄膜を原子間力顕微鏡(AFM)で観察した結果その表面粗さは3.92nm/μm^2であった. この試料抵抗の温度依存性を, 1/Tとしてプロットすると120Kにおいて抵抗変化曲線の傾きが変化するVerwey転移を示した. マグネタイトの最適成長温度は摂氏300度となったため、マグネタイト電極を用いたスピン注入デバイス作製のためのプロセスを開発する必要がある. レジストフリーの試料全面に高温成長されたマグネタイトを, 必要な部分のみ残してそれ以外をArプラズマによりエッチングし、レジストカバー直下, すなわち電極間に残っているマグネタイトをシリコン酸化膜とともにリフトオフをおこなうことで達成した. これらの結果については「電子情報通信学会、電子デバイス研究会2009年2月」で報告した. また光学的評価についてはスピン偏極率の確認は、InAs系のスピンダイオード構造およびGaAs/AlGaAs量子井戸耕造での近赤外円偏光測定を行うための測定系の構築を終えた。
日本学術振興会, 特定領域研究, 北海道大学, 20042001

Highly accurate thermodynamic calculation of spintronics device materials
Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
2007 - 2008
OHNO Munekazu
スピン注入デバイスの実現化に有力な候補である強磁性Fe/III-V 半導体ハイブリッド構造の相平衡を,第一原理計算及びCALPHAD 法から計算した.Al-As-Fe-Ga-In 系を対象として,各二元系及び三元系のモデリングを行い,特にFe/InAs 構造とFe/GaAs 構造作製時に形成される化合物の解明や,結晶成長の最適温度に関しての知見を得た.
Japan Society for the Promotion of Science, Grant-in-Aid for Young Scientists (B), Hokkaido University, 19760209

RESEARCH ON BASIC TECHNOLOGIES FOR THE REALIZATION OF CATE CONTROLLED SPINTRANSISTOR
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
2005 - 2007
YOH Knaji
High quality magnetite (Fe_3O_4) was found to be grown on (100) InAs surface. Magnetite film has become a candidate of high efficiency spin injector to be applied to spin transistor. On the other hand, we have also demonstrated gate controlled spin current oscillation due to spin-orbit interaction in Datta-Das type spin transistor structure based on Fe electrode and InAs-based heterostructure transistor at room temperature. In order to justify the observed experimental results of our spin FET characteristics, we have performed Monte Carlo Simulation taking account of Dyakonov - Perel mechanism. In a Datta-Das type spin transistor structure, it was found that vanishing of spin relaxation takes place when two spin orbit interaction, Rashba term and Dresselhaus term, equally contribute in InAs-based spin FET structure. Furthermore, it was found that the gate controlled spin precession takes place and resultant current oscillation should be observed even at room temperature when device operates in non-ballistic regime. Spin amplitude was also found to increase with the increase of lateral electric field (or drain voltage at given source drain distance). These predictions well explain what we have been observing in our Datta-Das type spin transistors. Other remarkable results include estimation of stay field near ferromagnetic electrode by micromagnetics calculation and thermal stability of iron/arsenide interface or thermodynamic calculation of stable compounds of iron and arsenic. Stray field near Fe wire film structure was found to be small except found in compounds such as As_2F (anti-ferro), AsF (anti-ferro), AsF_2 (normal metal) which well explains thermally unstable interface of Fe and InAs and suggests more stable spin injector material such as magnetite or iron silicide are suited for spin injector of spin FET.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 17206028

原子の集団挙動から内部組織形成までの統一的理論計算　　　　　　　　　　　　　　　
工学研究奨励援助金
2002 - 2003
大野 宗一
財団法人服部報公会, Principal investigator, Competitive research funding