Magnetic property of highly neutron-irradiated nuclear pressure vessel steels

高中子辐照核压力容器钢的磁性

• 批准号: 22760670
• 负责人: KOBAYASHI Satoru
• 金额: $ 2.58万
• 依托单位: Iwate University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22760670/
• 关键词: 磁性; 原子力エネルギー; 脆化予測; 磁気測定; 圧力容器; 非破壊評価; 照射脆化; 非破壊検査; 劣化予測

Long-term thermal aging experiments on reactor pressure vessel steels with variable key elements have been performed in order to elucidate mechanism of magnetic property changes due to neutron irradiation embrittlement in the high fluence regime. Aging time dependence of coercivity, depending on aging temperature and initial microstructure was observed. From these results, it was concluded that magnetic property changes can be due to a combined effect of the formation of Cu precipitates, recovery process, and relaxation of lattice strain in the matrix, and the major cause is strongly dependent on initial microstructure of the steels.

为了阐明高注量区中子辐照脆化导致的磁性能变化机制，对具有可变关键元素的反应堆压力容器钢进行了长期热老化实验。观察到矫顽力的时效时间依赖性取决于时效温度和初始微观结构。从这些结果可以得出结论，磁性能的变化可能是由于 Cu 沉淀物的形成、恢复过程和基体中晶格应变松弛的综合影响，而主要原因很大程度上取决于钢的初始微观结构。 。

项目成果

Magnetic investigation on thermally aged pressure vessel steels

热老化压力容器钢的磁性研究

• 发表时间: 2012
• 作者: S. Kobayashi; H. Sato; T. Iwawaki; T. Yamamoto; D. Klingensmith; G.R. Odette; Y. Kamada;H. Kikuchi
• 通讯作者: H. Kikuchi