采用多尺度计算方法模拟了中子辐照奥氏体不锈钢内位错环演化的行为。基于平均场速率理论构建了中子辐照诱导材料微观结构演化的物理模型,模型所需参数则采用分子动力学方法计算或参考文献数据得到(表1)。在此基础上,模拟了中子辐照奥氏体不锈钢内位错环的演化行为,预测了位错环的数密度、平均尺寸随损伤剂量的变化趋势(图1a)以及损伤剂量达到1 dpa时位错环的尺寸分布情况(图1b)。 The multi-scale calculation method was used to simulate the evolution of dislocation loops in neutron irradiated austenitic stainless steel. Based on the average field velocity theory, a physical model of the microstructure evolution induced by neutron irradiation was constructed. The required parameters of the model were calculated by molecular dynamics method or reference data (Table 1). On this basis, the evolution behavior of dislocation loops in neutron-irradiated austenitic stainless steel was simulated, the number density of dislocation loops was predicted, the average size of the dislocation loops changed with the dose of injury (Figure 1a), and the damage dose reached 1 dpa Dislocation ring when the size distribution (Figure 1b).