AZ31镁合金热变形过程中的流变应力The Flow Stress During Hot Deformation of AZ31 Magnesium Alloy
王庆,林金保,黄庆学,王翀
摘要(Abstract)：
在Gleeble-1500热模拟试验机和UTM5305实验机上以不同的变形条件对AZ31镁合金进行高温热变形试验,研究该材料在高温热变形过程中的真应力应变。研究结果证明:在变形过程中的AZ31镁合金的真应力随应变速率增大、变形温度降低而升高。在压缩变形过程中的真应力峰值、真应变和动态再结晶与拉伸变形过程相比有明显差异;该镁合金热变形过程中的真应力为用包含Arrhenius项的Zener-Hollomon参数来描述,其压缩拉伸变形激活能分别为132.38 kJ/mol和Q=255.26 kJ/mol.
关键词(KeyWords)： AZ31镁合金;热变形;流变应力
基金项目(Foundation): 国家自然科学基金(51204117)
作者(Author): 王庆,林金保,黄庆学,王翀
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