A multi-scale approach to radiation-induced segregation at various grain boundaries
A multi-scale approach to radiation-induced segregation at various grain boundaries
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DOI：
10.1016/j.jnucmat.2004.04.268
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发表时间：
2004-08
影响因子：
3.1
通讯作者：
N. Sakaguchi;Seiichi Watanabe;Heishichiro Takahashi;R. Faulkner
中科院分区：
文献类型：
--
作者：
N. Sakaguchi;Seiichi Watanabe;Heishichiro Takahashi;R. Faulkner
通过数值计算研究了奥氏体不锈钢中辐射诱发偏析（RIS）与晶界取向的关系。提出了一个新的反应速率方程模型，该模型考虑了点缺陷的晶界下沉强度。通过分子动力学（MD）和静力学（MS）确定的晶界附近的空位的相互作用能，确定作为函数的取向差角和取向差值的下沉强度。计算结果与电子和质子辐照实验数据吻合较好。良好的一致性支持了本模型的有效性。
We investigated the dependence of radiation-induced segregation (RIS) in austenitic stainless steels on grain boundary orientation by numerical calculations. A new rate equation model for RIS that incorporates the grain boundary sink strength for point defects was developed. The sink strength was determined as functions of misorientation angle and Σ values using interaction energies of vacancy near grain boundaries as determined by molecular dynamics (MD) and statics (MS). It was shown that the calculated results can reproduce the experimental data obtained by electron and proton irradiation experiments. The good agreement supports the validity of the present model.