Radiation-induced defects are the significant cause of radiation damage in austenitic stainless steels. In this work, the interactions between a screw dislocation and stacking fault tetrahedrons (SFTs) are studied in Fe–10Ni–20Cr (a model alloy of austenitic stainless steel) and Ni, using molecular dynamics simulations. Four interaction processes were primarily found, including (1) partial absorption, (2) sheared, (3) bypassing, and (4) restored through double cross-slip. In Fe–10Ni–20Cr alloys, there is almost no correlation between the critical resolved shear stress (CRSS) value and SFT size, but the intersection position largely impacts the results. And the CRSS value decreases with temperature increasing in Fe–10Ni–20Cr. The occurrence of cross-slip has a significant effect on the interactions, and there exist greater CRSS value in the interactions of cross-slipping. Besides, the occurrence of the cross-slip is linked to the stacking fault energy and the distribution of solu...

中文翻译：

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Fe–10Ni–20Cr和Ni中螺杆位错与堆垛层错四面体之间相互作用的分子动力学模拟

辐射引起的缺陷是奥氏体不锈钢辐射损伤的重要原因。在这项工作中，使用分子动力学模拟研究了在Fe-10Ni-20Cr（奥氏体不锈钢的模型合金）和Ni中，螺钉位错与堆垛层错四面体（SFT）之间的相互作用。主要发现了四个相互作用过程，包括（1）部分吸收，（2）剪切，（​​3）旁路和（4）通过双交叉滑移恢复。在Fe-10Ni-20Cr合金中，临界解析剪切应力（CRSS）值与SFT尺寸之间几乎没有关联，但是相交位置对结果影响很大。Fe–10Ni–20Cr中，CRSS值随温度升高而降低。交叉滑动的发生对相互作用产生重大影响，交叉滑移相互作用中存在较大的CRSS值。此外，交叉滑移的发生与堆垛层错能量和溶解度的分布有关。