2010 Fiscal Year Final Research Report
Microscopic analysis of stress-corrosion cracking of stainless steel by a positron microprobe
| Project/Area Number |
20760598
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Nuclear engineering
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| Research Institution | Japan Atomic Energy Agency |
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Principal Investigator |
MAEKAWA Masaki Japan Atomic Energy Agency, 先端基礎研究センター, 研究員 (10354945)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 陽電子マイクロビーム / 陽電子消滅法 / 空孔型欠陥 / 応力腐食割れ / ステンレス鋼 / 亀裂進展 / 耐食性 / 熱鋭敏化 |
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| Research Abstract |
The evaluation of a crack tip of stress-corrosion cracking on the stainless steel was carried out by a positron microprobe. The vacancy-type defects are introduced before crack grows. Vacancy type defects may be generated as crack precursor. Vacancy defects were identified as monovacancies. It was found that plastic deformation near the crack tip is one the candidate for the source of such vacancy defects.
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