The kinematic and isotropic hardening behavior was investigated for high and medium entropy alloys with a single-phase face-centered cubic (FCC) structure. The cross-slip associated with screw dislocations in FCC structures is strongly influenced by local fluctuations in the spatial distribution of different atom species. The local atomic arrangements inhibit the movement of Shockley partial dislocations during plastic deformation, thereby lowering the probability of cross-slip and generating a higher back-stress. This study used a solid-solution induced back-stress model, which combines nonlinear kinematic and isotropic hardening, to investigate the effects of dislocation forest stress and back-stress in a non-equiatomic Cr₁₂Fe₄₂Mn₂₄Ni₂₂ medium entropy alloy. Based on the experimental results, numerical simulations by the finite element method were performed to validate this modeling approach.

研究了具有单相面心立方 (FCC) 结构的高和中熵合金的运动学和各向同性硬化行为。与 FCC 结构中的螺旋位错相关的交叉滑移受到不同原子种类空间分布的局部波动的强烈影响。局部原子排列抑制了塑性变形过程中 Shockley 部分位错的运动，从而降低了横向滑移的概率并产生更高的背应力。本研究采用固溶诱导背应力模型，结合非线性运动学和各向同性硬化，研究位错林应力和背应力在非等原子 Cr ₁₂ Fe ₄₂ Mn ₂₄ Ni _{22 中的影响。}中熵合金。基于实验结果，通过有限元方法进行数值模拟以验证该建模方法。