Abstract The effect of elemental segregation on local hardness and microstructural evolution introduced by high strain-rate deformation in a CrMnFeCoNi high entropy alloy was investigated. Mn and Ni elemental segregation to interdendritic boundaries occurs during the solidification process and is intensified by dynamic deformation. Local hardness is reduced in the Mn and Ni enriched areas, which may be due to the increase of local stacking fault energy that changes the deformation mechanisms. This leads to the alternation of soft and hard regions and the structure is effective in hindering the propagation of adiabatic shear bands that would toughen the material.

中文翻译：

---

元素偏析对动态变形CrMnFeCoNi高熵合金组织演变和局部力学性能的影响

摘要 研究了元素偏析对CrMnFeCoNi 高熵合金中高应变率变形引起的局部硬度和显微组织演变的影响。Mn 和 Ni 元素偏析到枝晶间边界发生在凝固过程中，并因动态变形而加剧。Mn和Ni富集区局部硬度降低，这可能是由于局部堆垛层错能的增加改变了变形机制。这导致软区域和硬区域的交替，并且该结构可有效地阻止会使材料变韧的绝热剪切带的传播。