Effect of cyclic temperature change on microstructural evolution in austenitic stainless steels under fission neutron irradiation
Effect of cyclic temperature change on microstructural evolution in austenitic stainless steels under fission neutron irradiation
复制标题
裂变中子辐照下循环温度变化对奥氏体不锈钢显微组织演变的影响
DOI：
10.1016/0022-3115(94)90106-6
复制
发表时间：
1994
影响因子：
3.1
通讯作者：
T. Muroga
中科院分区：
文献类型：
--
作者：
N. Yoshida;Qiu Xu;Hideo Watanabe;Y. Miyamoto;T. Muroga
为了从机理上理解循环温度变化对Fe-Cr-Ni奥氏体合金微观结构演变的影响，在JMTR（0.9−1.4 × 1024 n/m2（> 1.0 MeV））进行了473 K/673 K和573 K/723 K的温度循环中子辐照。间质环形成的抑制是显着的。在Fe-Cr-Ni和Fe-Cr-Ni-P合金中仅形成少量大的空洞，但在Fe-Cr-Ni-Ti合金中观察到意外的大空洞膨胀（1.5- 1.6%，9-11%/dpa）。变温辐照下的缺陷成团速率理论表明，在高温阶段开始时，由于低温阶段形成的空位通过与辐照诱导空位和杂质的反应重新成团，出现了暂时的富空位状态。
To understand mechanistically the influence of cyclic temperature change on microstructural evolution in Fe-Cr-Ni austenitic alloys, temperature-cycle neutron irradiations of 473 K/673 K and 573 K/723 K were carried out at JMTR (0.9−1.4 × 1024n/m2(> 1.0 MeV)). Suppression of interstitial loop formation was remarkable. Only a few large voids were formed in Fe-Cr-Ni and Fe-Cr-Ni-P alloys, but unexpectedly large void swelling (1.5–1.6%, 9–11%/dpa) was observed in Fe-Cr-Ni-Ti alloy. Rate theory of defect clustering for temperature-variant irradiation indicates that vacancy-rich condition appears temporarily at the beginning of the high-temperature period due to the reclustering of the vacancies formed in the low-temperature period through the reactions with radiation-induced vacancies and interstitials.