In the high-entropy alloy (HEA) community, many researchers have been trying to improve the strength of the CoCrFeMnNi HEA by generating a transformation-induced-plasticity (TRIP) effect and/or maximizing the solid solution hardening effect. Adding vanadium (V) to the CoCrFeMnNi HEAs could be an effective way to improve strength, because vanadium stabilizes the body-centered cubic (bcc) phase and its atomic size is larger than Co, Cr, Fe, Mn, and Ni. To design high strength V-added HEAs, we investigated the effect of vanadium on the critical resolved shear stress (CRSS) by utilizing an atomistic simulation, proposing an empirical equation to estimate the relative effect of alloying elements on the CRSS. For this, we first developed the Co-Cr-Fe-Mn-Ni-V hexanary interatomic potential by newly developing the Cr-V, Fe-V, and Mn-V binary interatomic potentials. As a result, two novel V-added HEAs were designed and the designed HEAs show higher strength than the previously developed non-equiatomic CoCrFeMnNi HEAs, as predicted from the empirical equation.

在高熵合金 (HEA) 领域，许多研究人员一直试图通过产生相变诱导塑性 (TRIP) 效应和/或最大化固溶硬化效应来提高 CoCrFeMnNi HEA 的强度。在 CoCrFeMnNi HEAs 中添加钒 (V) 可能是提高强度的有效方法，因为钒可以稳定体心立方 (bcc) 相，并且其原子尺寸大于 Co、Cr、Fe、Mn 和 Ni。为了设计高强度添加 V 的 HEA，我们利用原子模拟研究了钒对临界分辨剪切应力 (CRSS) 的影响，并提出了一个经验方程来估计合金元素对 CRSS 的相对影响。为此，我们首先通过新开发的 Cr-V、Fe-V、和 Mn-V 二元原子间势。因此，设计了两种新型添加 V 的 HEA，并且设计的 HEA 显示出比先前开发的非等原子 CoCrFeMnNi HEA 更高的强度，如经验方程所预测的那样。