The hot compression tests of Mg-10.22Gd-2.31Y-0.1Zr alloy were implemented employing the Gleeble-1500 thermometer simulator at strain rates of 0.002 ~ 1 s⁻¹ and at the temperature of 350 ~ 500 °C. The results show that the flow stress shows a typical dynamic recrystallization (DRX) characteristic and is relatively sensitive to deformation parameters. The constitutive equation of the alloy is established to describe the flow behavior, and the critical strain model of DRX initiation is constructed in accordance with work-hardening theory. The critical strain reduces with rising of deformation temperature or decrease in strain rate except for instability condition. The DRX behavior is promoted as increase in the temperature or decrease in strain rate. Not only DRX, but also dynamic precipitation is observed during the hot deformation process. The dynamic precipitation β phase which is effected by temperature and strain rate could remarkably inhibit the growth of DRXed grain.

Mg-10.22Gd-2.31Y-0.1Zr 合金的热压缩试验采用 Gleeble-1500 温度计模拟器在 0.002 ~ 1 s ^{-1 的}应变速率下进行并且在 350 ~ 500 °C 的温度下。结果表明，流变应力表现出典型的动态再结晶（DRX）特性，对变形参数相对敏感。建立了合金的本构方程来描述流动行为，并根据加工硬化理论构建了DRX引发的临界应变模型。除不稳定条件外，临界应变随变形温度的升高或应变速率的降低而减小。随着温度的升高或应变率的降低，DRX 行为得到促进。在热变形过程中不仅可以观察到 DRX，还可以观察到动态析出。受温度和应变速率影响的动态析出β相可以显着抑制DRXed晶粒的生长。