稀土Y对挤压态AZ80-2Sn镁合金组织和性能的影响  

Effects of Yttrium Addition on Microstructure and Mechanical Properties of As-Extruded AZ80-2Sn Magnesium Alloys

作　　者：薛寒松[1,2] 杨钢[1] 李迪[1] 顾铭[1] 潘复生[1,2] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044 [2]重庆大学国家镁合金工程技术研究中心,重庆400044

出　　处：《铸造》2014年第10期1028-1031,共4页Foundry

基　　金：国家"973"重点基础研究项目(2013CB632200);重庆大学大型仪器设备开放基金(20131063009)

摘　　要：通过金相显微镜(OM)、扫描电子显微镜(SEM)、X射线衍射分析(XRD)及拉伸力学性能测试等手段,研究了Y元素添加对AZ80-2Sn镁合金挤压态组织和力学性能的影响。试验结果表明,当Y添加量为0.5%时,挤压态合金的组织得到有效的细化,合金的抗拉强度和伸长率达到最大值,分别为368.1 MPa和12.9%。与未添加Y的AZ80-2Sn合金相比,AZ80-2Sn-0.5Y合金的抗拉强度、屈服强度及伸长率分别提高5.8%、5.3%和33.7%,其综合力学性能达到最优。The effects of Y addition on microstructure and mechanical properties of as-extruded AZS0-2Sn magnesium alloys were investigated by OM, SEM, XRD and mechanical properties testing. The results show that the crystal grains of as-extruded AZS0-2Sn-0.5Y Mg alloy are refined effectively with 0.5% Y addition. The tensile strength and elongation of the alloy reached a maximum, 368.1 MPa and 12.9%, respectively. And AZ80-2Sn-0.5Y alloy shows the optimal mechanical property compared with AZ80-2Sn, where the tensile strength, yield strength and elongation are improved by 5.8%, 5.3% and 33.7%, respectively.

关 键 词：Y元素 镁合金 显微组织 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]