| Project/Area Number |
15K18235
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Structural/Functional materials
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 水素脆化 / 複相鋼 / 損傷成長 / 水素可視化 / 電子チャネリング / ケルビンプローブ / 銀デコレーション |
|---|
| Outline of Final Research Achievements |
Here, we focused on developments of characterization techniques for damage evolution and hydrogen visualization in multi-phase steels. Specifically, we obtained following achievements. 1) stable austenite strongly arrest damage growth. Namely, even when damage forms in hydrogen susceptible phase such as BCC martensite, the damage growth stops at austenite region, preventing failure. 2) Electron channeling contrast imaging that visualized twin and dislocations could demonstrate damage formation mechanisms in plate-like martensite. In addition, as the third achievement, we successfully established multi-scale spatially and kinetically resolved hydrogen mapping techniques by using Kelvin probe and silver decoration methods.
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