论文部分内容阅读
在Gleeble1500热模拟机上对直径10 mm,长度为12 mm的AZ31样品进行高温压缩试验,试样的加热温度在250~400℃,应变速率在0.01~1 s-1。研究了材料在不同温度及应变速率下的组织特征,探讨镁合金材料在高温压缩下的成形机制。结果表明:材料在不同条件下的组织演变规律与材料的高温变形行为密切相关;在300℃以上AZ31的塑性变形较好,但变形温度在300~350℃时,材料的变形则需要采用较高的应变率,反之AZ31合金的塑性明显降低。
AZ31 samples with a diameter of 10 mm and a length of 12 mm were subjected to high-temperature compression tests on a Gleeble1500 thermal simulator. The heating temperature was between 250 and 400 ° C and the strain rate was between 0.01 and 1 s-1. The microstructure of the material under different temperature and strain rate was studied, and the forming mechanism of magnesium alloy under high temperature was discussed. The results show that the microstructure evolution of the material under different conditions is closely related to the high temperature deformation behavior of the material. The plastic deformation of AZ31 is better than 300 ℃. However, the deformation of the material needs to be higher when the deformation temperature is between 300 and 350 ℃ Of the strain rate, whereas the plasticity of AZ31 alloy significantly reduced.