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利用Gleeble-1500型热模拟机,在应变速率为0.01～1s-1、变形温度为593～653K的变形条件下,对AZ80A镁合金进行等温压缩试验。结果表明:在较高变形温度或者较低应变速率时,AZ80A镁合金更易发生动态再结晶;根据热模拟试验所得的流动应力曲线确定了AZ80A镁合金的动态再结晶临界条件,并通过动力学分析并建立了该合金的动态再结晶模型,可为该合金组织模拟技术提供理论依据。
The isothermal compression test of AZ80A magnesium alloy was carried out with Gleeble-1500 thermal simulator under deformation conditions of strain rate of 0.01 ~ 1s-1 and deformation temperature of 593 ~ 653K. The results show that the dynamic recrystallization of AZ80A magnesium alloy is more likely at higher deformation temperature or lower strain rate. The critical dynamic recrystallization condition of AZ80A magnesium alloy is determined according to the flow stress curve obtained from the thermal simulation test. Through dynamic analysis The dynamic recrystallization model of the alloy is established, which can provide a theoretical basis for the simulation technology of the alloy.