HOME > Profile > EMURA, Satoshi
- Address
- 305-0047 1-2-1 Sengen Tsukuba Ibaraki JAPAN [Access]
Research
- Keywords
Structural Material, Titanium Alloy, Microstructure, Elemental Segregation, Layered Structure, Anisotropy, Stainless steel
PublicationsNIMS affiliated publications since 2004.
Research papers
- Satoshi Emura, Xin Ji. Introduction of Mille-Feuille-Like α/β Layered Structure into Ti–Mo Alloy. MATERIALS TRANSACTIONS. 61 [5] (2020) 856-861 10.2320/matertrans.mt-mm2019002 Open Access
- Ivan Gutierrez-Urrutia, Cheng-Lin Li, Xin Ji, Satoshi Emura, Koichi Tsuchiya. Quantitative analysis of {332}〈113〉 twinning in a Ti-15Mo alloy by in situ scanning electron microscopy. Science and Technology of Advanced Materials. 19 [1] (2018) 474-483 10.1080/14686996.2018.1475824 Open Access
- Baozhen Jiang, Satoshi Emura, Koichi Tsuchiya. Microstructural evolution and its effect on the mechanical behavior of Ti-5Al-5Mo-5V-3Cr alloy during aging. Materials Science and Engineering: A. 731 (2018) 239-248 10.1016/j.msea.2018.06.064
Proceedings
- Ivan Gutierrez-Urrutia, Cheng Lin Li, Xin Ji, Satoshi Emura, Koichi Tsuchiya. Twinning and Detwinning Mechanisms in Beta-Ti Alloys. MATERIALS SCIENCE FORUM. (2018) 821-826 10.4028/www.scientific.net/msf.941.821
- I Gutierrez-Urrutia, C-L Li, S Emura, K Tsuchiya. Twinning and detwinning mechanisms in a BCC Ti Mo-Fe multilayered alloy. IOP CONFERENCE SERIES:MATERIALS SCIENCE AND ENGINEERING. (2017) 012042-1-012042-7 10.1088/1757-899x/219/1/012042
- XU, Yibin, FANG, Lei, EMURA, Satoshi, Donald S. Shih. Decision Tree Data Mining in Ti-6Al-4V Alloy Development. The 5th Asian Materials Data Symposium Proceedings. (2016) 238-241
Presentations
- 江村 聡, 上路 林太郎. ミルフィーユ構造を持つTi-12Mo合金への圧縮試験によるキンク変形の導入. 日本金属学会 2022年秋期第171回講演大会 https://confit.atlas.jp/guide/event/jim2022autumn/top. 2022
- Fabien Briffod, Junyu Zhu, 白岩 隆行, 榎 学, EMURA, Satoshi. Microstructure and plastic deformation behavior of alpha/beta Ti-9Cr alloy with a multi-layered structure. 軽金属学会第142回春期大会 https://meeting.jilm.or.jp/142/. 2022
- Fabien Briffod, 網野 京勢, 白岩 隆行, 江村 聡, 榎 学. Multi-scale analysis of fatigue crack formation in a forged Ti-6Al-4V alloy. 日本金属学会2021年秋期（第169回）講演大会. 2021
Misc
- 江村 聡. 変形双晶と熱処理を利用したチタン合金へのミルフィーユ状層状組織の付与. 熱処理. (2020) 81-82
- 江村 聡, グティエレス ウルティア イヴァン, ジ シン, 土谷 浩一. β型チタン合金における双晶変形挙動の解析. 金属. [1] (2019) 14-20
- 江村 聡. 第14回チタン世界会議結果紹介 V-2. ミクロ組織と特性の関係 -Room 200. Titanium・Japan. (2019) 263
Published patent applications
- 被削性解析用ドリル穿孔急停止試験装置及び切屑解析方法 (2017)
- 快削鉄系形状記憶合金 (2014)
- Ti-Mo合金とその製造方法 (2014)
Society memberships
日本金属学会, 日本鉄鋼協会, 日本熱処理技術協会, 軽金属学会, 日本チタン学会
Awards
- 日本熱処理技術協会学術功績賞（林賞） (2026)
- 日本鉄鋼協会学術貢献賞（浅田賞） (2024)
- 日本熱処理技術協会口絵写真賞 (2021)
- 日本熱処理技術協会技術賞（粉生賞） (2020)
- 日本鉄鋼協会学術記念賞（白石記念賞） (2018)
Funds
- 天田財団 (2024)
- 池谷科学技術振興財団 (2024)
Research Center for Structural Materials
Microstructural control of titanium base materials through unique thermomechanical treatment
deformed structure, elemental segregation, texture, layered structure, anisotropy
Overview
Mechanical properties such as tensile strength, ductility and fatigue strength are strongly affected by chemical composition and microstructure. There are a lot of research efforts about microstructural control through thermomechanical processing (forging, rolling and heat treatment). We are focusing on new thermomechanical processing utilizing deformation twins and elemental segregation.
Novelty and originality
● New aspect of thermomechanical treatment using deformation twins and elemental segregation
● Highly controlled thermomechanical treatment collaborate with Materials Melting and Manufacturing Unit of NIMS
● Development of anisotropic materials such as layered structure
Details
(Upper) This figure shows the cross section of bar rolled Ti-12Mo (mass%) alloy. Due to the sluggish diffusion of Mo, swirly-like segregation band of Mo (VGS or Van Gogh’s Sky structure) occurs. After aging treatment, heterogeneous precipitation of ω phase (hard second phase) aligned with Mo segregation makes local hardness variation, which enhances the room temperature tensile elongation values.
S. Emura, X. H. Min, S. Ii and K. Tsuchiya, Key Engineering Materials, 551 (2013), 180-185.
(Lower) Light cold rolled and aged Ti-12Mo (mass%) alloy exhibits Mille-Feuille-Like α／β layered structure. β single phase Ti-12Mo alloy sheets (solution treated) are 5% cold rolled. After cold rolling, layered deformation twins are introduced. Following aging heat treatment enhances precipitation and growth of α phase at the twin boundary and makes α／β layered structure. Compression of this type of layered structure introduces unique kink structure (bended structure), which has possibility to enhance mechanical properties.
S. Emura and X. Ji, Materials Transactions, 61 (2020), 856-861
Summary
● Application for other titanium alloys
● Evaluation of other properties (fatigue strength, impact toughness)
● Application for large and/or complicated components
