In metastable high-entropy alloys (HEAs), the decrease of phase stability enables the development of dual-phase microstructure (interface hardening) and occurrence of strain-induced martensitic transformation (transformation-induced hardening), which overcomes the strength–ductility trade-off. The stacking-fault energy (SFE) is closely related to the phase stability and plays a key role in controlling the underlying deformation mechanism and hence the mechanical performance of HEAs. Here, we review some approaches of SFE calculation, including theoretical and experimental methods as well as the factors affecting SFE. Several compositional systems related to metastable HEAs are also briefly reviewed. Furthermore, we show the unique microstructure and the structure–property relationship of the metastable HEAs. Furthermore, some potential research topics in the future are also proposed.

中文翻译：

---

具有相变诱导塑性的亚稳态高熵合金的简要综述

在亚稳态高熵合金（HEAs）中，相稳定性的降低使得双相微观结构的发展（界面硬化）和应变诱导马氏体转变（相变诱导硬化）的发生，克服了强度-延展性的权衡——离开。堆垛层错能（SFE）与相稳定性密切相关，在控制潜在变形机制以及 HEAs 的机械性能方面起着关键作用。在这里，我们回顾了一些 SFE 计算方法，包括理论和实验方法以及影响 SFE 的因素。还简要回顾了与亚稳态 HEAs 相关的几个组成系统。此外，我们展示了亚稳态 HEAs 独特的微观结构和结构-性能关系。此外，