Abstract The stacking fault energy (SFE) values of several typical face-centered-cubic (fcc) high-entropy alloys (HEAs) were experimentally measured by weak-beam dark-field transmission electron microscopy. It was found that the SFE of the Fe-Co-Ni-Cr-Mn HEA system strongly depends on the SFE of the individual constituents. Specifically, the SFE of this HEA system is closely associated with the Ni concentration in the alloys. Additionally, the lower SFE tends to promote formation of more deformation twins with a smaller thickness under loading, leading to better mechanical properties, especially at low temperatures.

中文翻译：

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面心立方高熵合金的堆垛层错能

摘要 通过弱光束暗场透射电子显微镜实验测量了几种典型的面心立方（fcc）高熵合金（HEAs）的堆垛层错能（SFE）值。发现 Fe-Co-Ni-Cr-Mn HEA 系统的 SFE 强烈依赖于各个成分的 SFE。具体而言，该 HEA 系统的 SFE 与合金中的 Ni 浓度密切相关。此外，较低的 SFE 往往会促进在载荷下形成更多厚度更小的变形孪晶，从而导致更好的机械性能，尤其是在低温下。