The influence of simple thermomechanical processing such as hot deformation and heat treatment on the microstructure and hardness of an Al_0.3CoCrFeNi high-entropy alloy has been investigated. Results show that the relatively high deformation temperature can induce discontinuous dynamic recrystallization with fine grains initially nucleating at the elongated grain boundaries. The transition from partial recrystallization to fully recrystallization, as well as the precipitation behavior after annealing, has been described in detail. Both bcc precipitation and completely recrystallized grains can be observed after annealing at 1000 °C. Based on detailed microstructure analysis, the decrease in hardness value is shown to be related to both dynamic recrystallization and dynamic recovery which lead to softening.

研究了简单的热机械加工（例如热变形和热处理）对Al _0.3 CoCrFeNi高熵合金的组织和硬度的影响。结果表明，较高的形变温度可以引起不连续的动态再结晶，细晶粒最初在拉长的晶界处成核。已经详细描述了从部分重结晶到完全重结晶的过渡以及退火后的析出行为。在1000°C退火后，可以观察到bcc沉淀和完全重结晶的晶粒。基于详细的微观结构分析，硬度值的下降与动态再结晶和动态回弹均相关，从而导致软化。