借助平面压缩实验、力学特性测试及微观组织分析,研究变形温度(260,300,340,380,420℃)和变形程度(等效塑性应变:0.80,1.59,2.07,2.38,2.65)对均匀化处理(420℃×12 h)ZK60镁合金组织和力学特性的影响规律.研究表明:在相同变形量下,随变形温度上升,ZK60镁合金抗拉强度先增加后减小,合金的伸长率先增加后减小,最后又上升;随变形量的增加,ZK60镁合金的抗拉强度和伸长率先增加后减小.等效塑性应变为2.07,获得比较细小的等轴晶粒,使合金的强度和伸长率大幅提高.
Using planar compression experiments, metallographic observation and the mechanical properties tests, the microstructure and mechanical properties of ZK60 magnesium alloy under homogenization treatment(420℃×12 h)and further deformation at different temperature(260,300,340,380,420℃)at different equivalent plastic strain(0.80,1.59,2.07,2.38, 2.65) were studied. The results show that the tensile strength of ZK60 alloy increases firstly and then decreases as the deformation temperature increases at the same plastic strain. However,the elongation of ZK60 alloy increases firstly and then decreases and increases finally. The tensile strength and elongation of ZK60 alloy increase firstly and then decrease as the plastic strain increases at the same deformation temperature. When the equivalent strain is 2.07,fine equiaxed grains are observed, which lead to the high tensile strength and elongation for ZK60 alloy.
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