热变形对AZ80镁合金组织性能的影响
Effect of Hot Forming on Microstructure and Mechanical Properties of AZ80 Magnesium Alloy
杨亚琴, 李保成, 张治民, 李兆智
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作者单位：(中北大学 材料科学与工程学院, 山西 太原 030051)
中文关键字：AZ80镁合金； 压缩变形； 时效处理； 组织； 性能
英文关键字：AZ80 magnesium alloy; compression; age treatment; microstructure; mechanical properties
中文摘要：对AZ80镁合金进行了平面应变等温压缩试验，并对压缩试样进行了时效处理。对不同变形条件下压缩试样的组织与力学性能进行了分析，并对压缩试样及压缩 + 时效处理试样的组织性能进行了比较。结果表明，AZ80镁合金通过热变形，其抗拉强度均有不同程度的提高。 时效处理对压缩试样的性能影响不大，主要是由于压缩后试样在水冷过程中，析出部分第二相起到了弥散强化效果。 在本实验范围内， AZ80镁合金在低温区结合大的变形量进行压缩变形后水冷，可获得较高的抗拉强度。
英文摘要：The plane strain compression test of AZ80 magnesium alloys under different conditions was carried on, and the samples compressed at 300 ℃ were aging-treated. The microstructure and mechanical properties of the alloys via compression treatment and compression + aging treatment were investigated. The results show that the mechanical properties of AZ80 magnesium alloy improve after hot deformation. Age treatment has little effect on the properties of compression samples, this is mainly because the second phase which has the obvious dispersion strengthening precipitates from the compressed samples during the water cooling. In the experiment, the AZ80 magnesium alloys compressed at low temperature and large strain then water cooling can gain the higher tensile strength.