New strengthening mechanism of alpha-iron based materials by introduction of high-energy dislocations
| Project/Area Number |
15K14109
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Physical properties of metals/Metal-base materials
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| Research Institution | Shimane University |
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Principal Investigator |
Arakawa Kazuto 島根大学, 総合理工学研究科, 准教授 (30294367)
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| Co-Investigator(Renkei-kenkyūsha) |
TANAKA Nobuo 名古屋大学, エコトピア科学研究所, 教授 (40126876)
KOMATSU Masao 広島工業大学, 工学研究科, 教授 (80309616)
SANO Tomokazu 大阪大学, 工学研究科, 准教授 (30314371)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 転位 / 材料強化 / 鉄鋼 / 電子顕微鏡 |
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| Outline of Final Research Achievements |
It has been recognized that plastic deformation of alpha-iron based materials is governed by dislocations with the Burgers vector of 1/2<111>. In contrast, “high-energy” <100> dislocations have been ignored because of their instability. However, it is expected that alpha-iron based materials can be strengthened by replacement of major dislocations with <100> dislocations.
In the present study, we have aimed at opening up a new strengthening mechanism by <100> dislocations. For this purpose, we explored conditions for introduction of <100> dislocations as major dislocations.
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Report
(4 results)
Research Products
(27 results)
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[Presentation] Direct HRTEM Observation of the Clustering Process of Self-Interstitial Atoms in Iron2016
Author(s)
Kazuto Arakawa, Shigeo Arai, Cosmin Marinica, Estelle Meslin, Francois Willaime, Takafumi Amino, Par Olsson, Sergei Dudarev, Yonfeng Zhang, Hidehiro Yasuda, Hirotaro Mori, Yoshifumi Oshima, Yuta Yamamoto, Nobuo Tanaka
Organizer
8th International Conference on Multiscale Materials Modeling (MMM 2016)
Place of Presentation
Palais des Congres, Dijion, France
Year and Date
2016-10-09
Related Report
Int'l Joint Research / Invited
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