Abstract High-entropy alloys (HEAs) provide a new perspective to design metastable alloys with the stress-induced martensitic transformation (SIMT) for overcoming the strength-ductility trade-off. Here, we report a novel SIMT, orthorhombic to hexagonal close-packed martensite, in a single orthorhombic refractory HEA (Ti16Zr35Hf35Ta14 RHEA), showing a good yield strength-ductility matching. The analysis of the elastic distortion energy (∆Eels) of Ti16Zr35Hf35Ta14 and several other RHEAs reveals that severe lattice distortion is a key factor which causes this SIMT. Combined the “d-electron alloy design” approach with the ∆Eels, the phase configuration and SIMT path in RHEAs can be well predicted. Our work brings new insights between the lattice distortion and SIMT of RHEAs, benefiting the metastable alloy development.

中文翻译：

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单相难熔高熵合金中一种新的应力诱导马氏体转变

摘要 高熵合金 (HEAs) 为设计具有应力诱导马氏体转变 (SIMT) 的亚稳态合金提供了新的视角，以克服强度-延展性的权衡。在这里，我们报告了一种新型 SIMT，斜方至六方密堆积马氏体，在单个斜方耐火 HEA (Ti16Zr35Hf35Ta14 RHEA) 中，显示出良好的屈服强度-延展性匹配。对 Ti16Zr35Hf35Ta14 和其他几种 RHEA 的弹性变形能 (ΔEels) 的分析表明，严重的晶格变形是导致这种 SIMT 的关键因素。将“d 电子合金设计”方法与 ΔEels 相结合，可以很好地预测 RHEA 中的相配置和 SIMT 路径。我们的工作在 RHEA 的晶格畸变和 SIMT 之间带来了新的见解，有利于亚稳态合金的发展。