Recent investigations suggest that the addition of trace Re element has a significant influence (the so-called Re-effect) on the mechanical properties of Ni-based single crystal superalloys. Nevertheless, the mechanisms for this Re-effect at different service temperatures are still unclear. The present work studied the elastoplastic deformation behavior of the γ phase in Ni-based single crystal superalloys by molecular dynamics, with the emphasis on Re-associated mechanisms at a wide range of Re contents (from 0 at.% to 9 at.%) and temperatures (from 300 K to 1100 K). The results indicate that the Re content and temperature have an obvious effect on the elastic modulus of the γ phase, the higher the Re content and temperature, the lower the elastic modulus. The yield stress and strain decrease with the increase of Re content and temperature. Both the temperature and Re content affect the formation and propagation of dislocations, which further leads to a correlation between the evolution of dislocations and stress-strain. In addition, the effects of size and strain rate on elastoplastic behavior are also studied.

最近的研究表明，添加微量 Re 元素对 Ni 基单晶高温合金的机械性能有显着影响（所谓的 Re 效应）。然而，在不同使用温度下这种重新效应的机制仍不清楚。目前的工作通过分子动力学研究了 Ni 基单晶高温合金中 γ 相的弹塑性变形行为，重点是在很宽的 Re 含量范围内（从 0 at.% 到 9 at.%）的 Re 相关机制。和温度（从 300 K 到 1100 K）。结果表明，Re含量和温度对γ相的弹性模量有明显影响，Re含量和温度越高，弹性模量越低。屈服应力和应变随着 Re 含量和温度的增加而减小。温度和 Re 含量都会影响位错的形成和传播，这进一步导致位错演化与应力应变之间存在相关性。此外，还研究了尺寸和应变率对弹塑性行为的影响。