Submitted
Phase-separation induced dislocation-network cellular structures in Ti- Zr-Nb-Mo-Ta high-entropy alloy processed by laser powder bed fusion,
Han Chen, Daisuke Egusa*, Zehao Li, Taisuke Sasaki, Ryosuke Ozasa, Takuya Ishimoto, Masayuki Okugawa, Yuichiro Koizumi, Takayoshi Nakano, Eiji Abe*.
Chemical and topological short-range ordering in beta Ti-Fe-Sn-Nb alloys,
Dmitri V. Louzguine-Luzgin*, Masayuki Okugawa, Anh Khoa Augustin Lu, Yuri P. Ivanov, Alan Lindsay Greer.
Atom-Mimetic Cube-Diagonally Muliti-Axed Phase-Transforming Cellular Material for Multi-axial Bistable Metamaterial,
Sosuke Kanegae, Masayuki Okugawa*, Yuichiro Koizumi*.
Quantitative modeling of non-equilibrium microstructures of Al-Cu alloys under ultra-high cooling rates,
Chuanqi Zhu, Yuichiro Koizumi, Yusuke Seguchi, Masayuki Okugawa, Yun Zou, Yuheng Liu, Lu-chung Chuang, Kozo Fujiwara*
A middle-obstacle approach of mapping phase-field model to its sharp interface correspondence under universal cooling conditions
Chuanqi Zhu, Yusuke Seguchi, Masayuki Okugawa, Yuichiro Koizumi*.
Articles: 34 papers, Reviews: 9 papers, Book chapters: 3 chapters
Articles
34. Promoting the ordering of L10-FeNi phase via chemical interactions with substrate: A molecular dynamics simulation study,
Masayuki Okugawa*, Dmitri V. Louzguine, Yuichiro Koizumi, Takeshi Nakanishi.
Scripta Materialia, in press.
33. Resolving the Long-Standing Discrepancy in Fe3Al Ordering Mobilities: A Synergistic Experimental and Phase-Field Study
Yuheng Liu, Madoka Watanabe, Masayuki Okugawa*, Takashi Hagiwara, Tsubasa Sato, Yusuke Seguchi, Yoshitaka Adachi, Yoritoshi Minamino, Yuichiro Koizumi*,
Acta Materialia, Vol. 273, No. 1 (2024), 119958.
32. Laser Powder Bed Fusion (LPBF) processing effects on microstructural evolution and hardness property of the Ti6246 alloy,
Prince Valentine Cobbinah, Sae Matsunaga, Yoshiaki Toda, Ryosuke Ozasa, Takuya Ishimoto, Masayuki Okugawa, Yuheng Liu, Yuichiro Koizumi, Takayoshi Nakano, Yoko Yamabe-Mitarai,
Smart Materials in Manufacturing, Vol. 2 (2024), 100050.
31. Solute segregation in a rapidly solidified Hastelloy-X Ni-based superalloy during laser powder bed fusion investigated by phase-field and computational thermal-fluid dynamics simulations
Masayuki Okugawa*, Kenji Saito, Haruki Yoshima, Katsuhiko Sawaizumi, Sukeharu Nomoto, Makoto Watanabe, Takayoshi Nakano, Yuichiro Koizumi,
Additive Manufacturing, Vol. 84, No. 25 (2024), 104079.
30. Data assimilation for phase-field simulation of microstructure formation of eutectic alloy,
Yusuke Seguchi, Masayuki Okugawa*, Chuanqi Zhu, Akinori Yamanaka, Yuichiro Koizumi,
Computational Materials Science, 237 (2024) 112910.
29. Martensitic Phase Transforming Metamaterial,
Sosuke Kanegae, Masayuki Okugawa*, Yuichiro Koizumi,
Materials, Vol. 16 No. 21 (2023), 6854.
28. Fusion of Ni plating on CP-Titanium by electron beam single-track scanning: toward a new approach for fabricating TiNi self-healing shape memory coating,
Lei Wang, Masayuki Okugawa*, Hirokazu Konishi, Yuichiro Koizumi, Takayoshi Nakano,
Materials, Vol.16 (2023), 5449.
27. Phase-Field modeling of spinodal decomposition in Fe-Cr-Co alloy under continuous temperature-changing conditions
Yuheng Liu, Masayuki Okugawa, Kenji Saito, Daichi Izumikawa, Yuichiro Koizumi,
ISIJ international, in press.
26. Fabrication and Process Monitoring of 316L Stainless Steel by Laser Powder Bed Fusion with µ-Helix Scanning Strategy and Narrow Scanning Line Intervals
Yuheng Liu, Kazufumi Nose, Masayuki Okugawa, Yuichiro Koizumi, Takayoshi Nakano,
Materials Transactions, Vol. 64 (2023), in press.
25. Influences of Growth Front Surfaces on the Grain Boundary Development of Multi-crystalline Silicon during Directional Solidification: 2D/3D Multi-Phase-Field Study
Chuanqi Zhu, Yusuke Seguchi, Masayuki Okugawa, Chunwen Guo, Yuichiro Koizumi,
Materialia, in press.
24. Raking process for Powder Bed Fusion of Ti-6Al-4V alloy Powder Analyzed by Discrete Element Method,
Masayuki Okugawa, Yusuke Isono, Yuichiro Koizumi, Takayoshi Nakano,
Materials Transactions, Vol. 64 (2023) pp. 37-43,（軽金属, 72, 6 (2022), 1–7. [View on-line] ）.
23. Effect of Rapid Heating and Cooling Conditions on Microstructure Formation in Laser Powder-bed fusion of Al-Si Hypoeutectic Alloy: A Phase-Field Study,
Masayuki Okugawa, Yuya Furushiro, Yuichiro Koizumi,
Materials, Vol. 15 (2022) 6092. [View on-line]
22. Thermally-Induced Phase Transforming Cellular Lattice Driven by Bimetal Beams
H. Nagayama, S. Kanegae, M. Hosoda, M. Okugawa, Y. Koizumi
MRS advanced, 7 (2022) 701–705. [View on-line]
21. Ultrafine Nanoporous Intermetallic Catalysts by High-Temperature Liquid Metal Dealloying for Electrochemical Hydrogen Production
R. Song, J. Han, M. Okugawa, R. Belosludov, T. Wada, J. Jiang, D. Wei, A. Kubo, Y. Tian, H. Kato, M. Chen,
Nature Communication, 13 (2022) 5157. [View on-line]
20. Equiaxed grain formation by intrinsic heterogeneous nucleation via rapid heating and cooling in additive manufacturing of aluminum-silicon hypoeutectic alloy
M. Okugawa, Y. Ohigashi, Y. Furushiro, Y. Koizumi, T. Nakano,
Journal of alloy and compounds, 919 (2022) 165812. [View on-line]
19. 代表体積要素モデルを用いた有限要素法による多軸双安定構造の大変形挙動解析
鐘ヶ江壮介, 奥川将行, 小泉雄一郎,
計算工学講演会論文集, 27 (2022) B-08-03.
18. Spinodal decomposition in plastically deformed Fe-Cr-Co magnet alloy
H. Iwaizako, M. Okugawa, K. Saito, Y. Koizumi, A. Chiba, Y. Tachiya, M. Ohnuma, K. Kuritani
ISIJ international, 62, 6 (2022) 1268-1274. (鉄と鋼, Vol.107, No.2 (2021)) [View on-line]
17. フェーズフィールド法によるNi基超合金付加製造における凝固偏析予測
奥川将行、齊藤 賢士、若林 誠、小泉雄一郎
スマートプロセス学会, 10, 4 (2021) 214-219. [View on-line]
16. 付加製造用電子ビーム照射によるSUS316L鋼の溶融・凝固挙動
奥川将行、宮田雄一朗、王雷、能勢和史、小泉雄一郎、中野貴由
スマートプロセス学会, 10, 4(2021) 208-213. [View on-line]
15. Inverse columnar-equiaxed transition in 304 and 316L stainless steels
melt by electron-beam for additive manufacturing,
Y. Miyata, M. Okugawa, Y. Koizumi, T. Nakano
Crystals, 11, 8 (2021) 856. [View on-line]
14. 3Dプリントを活用した形状記憶・衝撃吸収メタマテリアル開発
鐘ヶ江壮介，奥川将行，小泉雄一郎，
The Journal of 4D and Functional Fabrication, 2020年9月, 1, 1-8. [View on-line]
13. 多元系合金における界面偏析のフェーズフィールド解析
奥川将行，泉川大智，小泉雄一郎
計算工学講演会論文集, 25 (2020) E-05-02．
12. Fe3Alにおける規則ドメイン成長のフェーズフィールド法を用いたD03型規則構造の規則化易動度の検証
渡辺まどか，奥川将行，小泉雄一郎
計算工学講演会論文集, 25 (2020) E-05-01．
11. Simulations of Non-equilibrium and Equilibrium Segregation in Nickel-based Superalloy Using Modified Scheil-Gulliver and Phase-field Methods,
M. Okugawa, D. Izumikawa, Y. Koizumi
Materials
Transactions, Vol. 61, No. 11 (SIP Materials Integration Project), pp. 2072-2078 (2020) [View on-line]
10. Effects of hydrogen on structure and crystallization behavior of sputter-deposited amorphous germanium films,
Y. Hanya, R. Nakamura, M. Okugawa, M. Ishimaru, G. Oohata, H. Yasuda,
Japanese Journal of Applied Physics 128, 015303-1 (2020). [View on-line]
9. Dual crystallization modes of sputter-deposited amorphous SiGe films
M. Okugawa, R. Nakamura, H. Numakura, M. Ishimaru, H. Yasuda,
Journal of Applied Physics 128, 015303 (2020). [View on-line]
8. Direct observations of crystallization processes of amorphous GeSn during thermal annealing: A temperature window for suppressing Sn segregation
M. Higashiyama, M. Ishimaru, M. Okugawa, R. Nakamura
Journal of Applied Physics 125, 175703 (2019). [View on-line]
7. The relation between amorphous structure and explosive crystallization of sputter-deposited amorphous germanium thin films
M. Okugawa, R. Nakamura, H. Numakura, A. Heya, N. Matsuo, H. Yasuda
Japanese Journal of Applied Physics, 58 (4), 045501 (2019). [View on-line]
6. Structure of crystallized particles in sputter-deposited amorphous germanium films
M. Okugawa, R. Nakamura, A. Hirata, M. Ishimaru, H. Yasuda, and H. Numakura
Journal of Applied Crystallography, 51, 1467 (2018). [View on-line]
5. Crystallization processes of amorphous GeSn thin films by heat treatment and electron beam irradiation
T. Kimura, M. Ishimaru, M. Okugawa, R. Nakamura, H. Yasuda
Japanese Journal of Applied Physics, 56, 100307. [View on-line]
4. Thermal crystallization of sputter-deposited amorphous Ge films: Competition of diamond cubic and hexagonal phases
M. Okugawa, R. Nakamura, M. Ishimaru, H. Yasuda, H. Numakura
AIP Advances, 2016年12月, 6 (12), 125035-1－125035-9. [View on-line]
3. Crystallization of sputter-deposited amorphous Ge films by electron irradiation: Effect of low-flux pre-irradiation
M. Okugawa, R. Nakamura, M. Ishimaru, H. Yasuda, H. Numakura
J. Appl. Phys., 2016年9月, 120 (13), 134308-1－134308-7. [View on-line]
2. Structural transition in sputter-deposited amorphous germanium films by aging at ambient temperature
M. Okugawa, R. Nakamura, M. Ishimaru, K. Watanabe, H. Yasuda, H. Numakura
J. Appl. Phys., 2016年5月, 119 (21), 214309-1－214309-7. [View on-line]
1. Discussion of “On the Boltzmann–Matano Analysis of Diffusion in a Semi-infinite Medium”
M. Okugawa, H. Numakura
Metallurgical and Materials Transactions A, 2015年7月, 46, 3813-3814. [View on-line]
Reviews
11. 金属3Ｄプリントのデジタルツイン科学と新材料創製,
小泉雄一郎, 奥川将行, 柳玉恒, 中野貴由,
光技術コンタクト誌, in press.
10. Ni基超合金の粉末床溶融結合法における溶質元素偏析の計算機シミュレーション解析
奥川将行, 澤泉克彦, 廣岡勢, 柳玉恒, 小泉雄一郎, 中野貴由,
スマートプロセス学会誌, Vol. 12, No.4, (2024) in press.
9. Al-Si共晶合金の粉末床溶融結合型Additive Manufacturingにおける内在的不均一核生成による結晶粒微細化
奥川将行, 小泉雄一郎, 中野貴由,
レーザ加工学会誌, in press.
8. 金属AMのデジタルツイン科学と超温度場材料創成学,
小泉雄一郎，奥川将行，柳玉恒，中野貴由
日本溶射学会誌 溶射, 60, 1 (2023) 11–24.
6. Digital Twin Science of Metal Powder Bed Fusion Additive Manufacturing: A review of Computer Simulations
Y. Koizumi, M. Okugawa
ISIJ International, 62, 11 (2022) 2183–2196. [View on-line]
5. 粉末床溶融結合（PBF）型金属付加製造(AM) のデジタルツイン科学と超温度場材料創成学
奥川将行, 柳 玉恒, 小泉雄一郎
ふぇらむ, 27, 12 (2022), pp. 1-9.
3. 異方性カスタム設計コンセプトに基づく金属付加製造（AM）研究
小泉 雄一郎, 奥川 将行, 石本 卓也, 趙 研, 安田 弘行, 中野 貴由
日本ガスタービン学会誌, 50, 2 (2022) 84-89．
1. 気相法で作製したアモルファスゲルマニウム薄膜の構造変化と結晶化
仲村龍介，奥川将行，沼倉宏, 顕微鏡, 52, 1-4 (2017). [View on-line]
Book chapters
3.メタマテリアルの設計、作製と新材料、デバイス開発への応用
編集：技術情報協会
技術情報協会 2022年3月 (ISBN: 4861048761)
2.デジタル化時代のAdditive Manufacturingの基礎と応用
編集：桐原, 聡秀, 近藤, 勝義, 西川, 宏, 田中, 学,
リブロ社, Jan 26, 2022 (ISBN: 4915697371)
1. 3Dプリントの材料・プロセス設計のための 計算機シミュレーション
小泉雄一郎，奥川将行，In 萩原 恒夫 (ed.), 3Dプリンタ用新規材料開発 （エヌティーエヌ）, chap. 2 (2020). ISBN／978－4－86043－710－7
Press releases
1. 3D造形 微細化解明 車・航空宇宙向け応用
日刊工業新聞，2022年7月8日，朝刊，科学技術・大学欄．
