Zr对铸态Mg-7Gd-3Y镁合金组织和性能的影响
Effect of Zr on Microstructure and Mechanical Property of As-cast Mg-7Gd-3Y Alloy
董丽君， 吴安如， 贺 佳， 王克龙
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作者单位：湖南工程学院 机械工程学院，湖南 湘潭 411101
中文关键字： Mg-Gd-Y-Zr镁合金； Zr； 显微组织； 力学性能
英文关键字：Mg-Gd-Y-Zr alloy; Zr; microstructure; mechanical properties
中文摘要：Mg-7Gd-3Y and Mg-7Gd-3Y-0.5Zr magnesium alloy were prepared under the combined protection of magnesium melting cover solvent and argon. The microstructure and mechanical properties of the alloy were analyzed by optical microscopy, X-ray diffraction analysis and tensile test. The effects of Zr on the grain size and room temperature tensile properties of the as-cast alloy were investigated. The results show that Zr addition can immensely refine the grain size, greatly enhance tensile strength and elongation percentage of the as-cast alloy.
英文摘要：在稀土镁合金专用熔剂覆盖和氩气保护下制备了Mg-7Gd-3Y、Mg-7Gd-3Y-0.5Zr两种合金。采用光学显微镜、X射线衍射、室温力学测试对合金的显微组织与力学性能进行了分析，研究了Zr元素对合金晶粒大小及铸态力学性能的影响。结果表明，Zr可以极大地细化Mg-7Gd-3Y合金的晶粒；Zr元素的添加，使合金铸态下的抗拉强度和伸长率均得到了较大提高。