Mechanical characterization of local deformation behavior in the vicinity of grain boundary
Project/Area Number |
20560663
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Structural/Functional materials
|
Research Institution | National Institute for Materials Science |
Principal Investigator |
OHMURA Takahito National Institute for Materials Science, 新構造材料センター, 主幹研究員 (40343884)
|
Project Period (FY) |
2008 – 2010
|
Project Status |
Completed (Fiscal Year 2010)
|
Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2009: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
|
Keywords | 鉄鋼材料 / 結晶粒界 / 転位 / 力学挙動 / ナノインデンテーション / 透過電子顕微鏡 / その場観察 / 粒界 / 格子欠陥 / 塑性変形 / 局所変形挙動 / 相変態 / 異相界面 |
Research Abstract |
Nano-scale mechanical characterization was applied to grain boundary of steels and fundamental deformation behavior was analyzed to consider the mechanism of grain boundary strengthening. The critical stress for the plasticity initiation is lower for the grain boundary than that for the grain interior. Through the in-situ nanoindentation in a TEM, it was found that the flow stress dropped with drastic dislocation multiplication. There was no remarkable dislocation pile-up at the grain boundary even though the grain boundary has a large angle.
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Report
(4 results)
Research Products
(25 results)