Dislocation theory model for local deformation behavior in bcc metal through TEM in-situ straining technique
| Project/Area Number |
15H04149
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
Ohmura Takahito 国立研究開発法人物質・材料研究機構, 構造材料研究拠点, 副拠点長 (40343884)
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| Co-Investigator(Kenkyū-buntansha) |
井 誠一郎 国立研究開発法人物質・材料研究機構, 構造材料研究拠点, 主幹研究員 (60435146)
関戸 信彰 国立研究開発法人物質・材料研究機構, 構造材料研究拠点, 主任研究員 (10462516)
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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 |
¥13,000,000 (Direct Cost: ¥10,000,000、Indirect Cost: ¥3,000,000)
Fiscal Year 2017: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2015: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
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| Keywords | Fe基合金 / 転位 / 粒界 / 結晶粒径 / ナノインデンテーション / 金属物性 / 構造材料 / 塑性変形 / 透過電子顕微鏡 / Ｆｅ基合金 |
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| Outline of Final Research Achievements |
TEM in-situ straining measurements for Fe base alloys revealed that dislocations disappear at the grain boundary during deformation, which is not consistent with conventional of pile-up model. In the case of a steel containing carbon with fine microstructures, strain burst is retard due to a high resistance to dislocation motion. The fine structure causes low dislocation mobility and depresses a dislocation multiplication leading to a planar dislocation structure. The size of plastic zone underneath the indenter induced by ex-situ indentation is smaller for Fe-Si alloy that that of IF steel.
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Report
(4 results)
Research Products
(11 results)
