| Project/Area Number |
20760588
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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 | Iwate University |
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Principal Investigator |
KOBAYASHI Satoru Iwate University, 工学部, 助教 (30396410)
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| Project Period (FY) |
2008 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
|
| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2009: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2008: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 磁性 / 原子力エネルギー / 格子欠陥 / 脆化予測 / 照射脆化 / 非破壊検査 / 劣化予測 / データベース |
|---|
| Research Abstract |
A database of relationship between magnetic properties and irradiation embrittlement has been developed by magnetic measurements on neutron-irradiated nuclear reactor pressure vessel steels under a cooperative research with University of California Santa Barbara U.S.A. Analysis of magnetic minor hysteresis loops revealed that the magnetic properties exhibit a similar trend to yield stress changes under various alloy-irradiation conditions. In addition, model analysis assuming two mechanisms which affect magnetic properties, i.e. formation of Cu-rich precipitates and stress relaxation, showed that magnetic property increases due to Cu-rich precipitation is linearly proportional to yield stress changes. These observations indicate that yield stress changes, which are related to irradiation hardening, can be evaluated by magnetic measurements.
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