Mg-6.0%Zn-0.5%Zr-2.0%Nd-1.0%Y合金的时效强化研究Study on aging strengthening behavior of Mg-6.0%Zn-0.5%Zr-2.0%Nd-1.0%Y alloy
吴安如,夏长清,董丽君,覃波
摘要(Abstract)：
对挤压+轧制制备的Mg-6.0%Zn-0.5%Zr-2.0%Nd-1.0%Y合金进行T5、T6两种热处理,通过力学性能测试,试验合金的力学性能优于未添加稀土元素的ZK60合金,在T5处理时的硬度高于T6处理时的,由金相显微观察、透射电子图像分析可知,试验合金的强化来源于时效初期的β′过渡相与位错的交互作用,435℃×2h固溶+150℃时效后,Mg-6.0%Zn-0.5%Zr-2.0%Nd-1.0%Y合金的脱溶顺序为:GP区→β′(过渡相)→β(平衡相)。其时效温度-时效时间-脱溶产物之间的关系可用自由能-成分关系或过冷奥氏体等温转变曲线来表示。
关键词(KeyWords)： 稀土元素;力学性能;时效强化;脱溶
基金项目(Foundation): 湖南省教育厅科研资助项目(05C575)
作者(Author): 吴安如,夏长清,董丽君,覃波
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