2011 Fiscal Year Final Research Report
Microstructure of RPV steels under dynamic irradiation environment
| Project/Area Number |
20360420
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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 |
Nuclear engineering
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| Research Institution | Kyushu University |
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Principal Investigator |
WATANABE Hideo 九州大学, 応用力学研究所, 准教授 (90212323)
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| Co-Investigator(Kenkyū-buntansha) |
KAMADA Yasuhiro 岩手大学, 工学部, 准教授 (00294025)
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| Co-Investigator(Renkei-kenkyūsha) |
YOSIDA Naoaki 九州大学, 応用力学研究所, 特任教授 (00127317)
SUYA Noriyosi 放射線総合医学研究所, 主任技師 (70606988)
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| Project Period (FY) |
2008 – 2011
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| Keywords | 圧力容器 / 高経年化 / マトリクス欠陥 / 照射脆化 / イオン照射 / 内部組織 |
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| Research Abstract |
In this study, small tensile test machine was inserted in beam line of tandem type accelerator. After the 2. 4 MeV Fe2+ ion irradiation, the microstructure and hardness changes of the specimens with and without stress conditions were studied. In without stress, formation of small interstitial typed dislocation loop is prominent in matrix and also in the vicinity of dislocation in Fe-1. 4wt% Mn alloy. The radiation induced hardening of the samples with stress condition was more prominent than without stress condition at room temperature. But at 563K, the effect of stress on hardness changes is minor. The study revealed that the formation of interstitial type dislocation loops which enhanced by Mn addition was essential for irradiation hardening of these samples in with and without stress conditions.
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