Al对Mg-1％Cu合金显微组织和力学性能的影响  

Effect of Al on microstructure and mechanical properties of Mg-1%Cu alloys

作　　者：黄晓锋[1,2] 李维亮[1] 冯凯[1] 张少辉[1] 李向平[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料重点实验室,甘肃兰州730050 [2]兰州理工大学有色金属合金及加工教育部重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2013年第4期1-4,共4页Journal of Lanzhou University of Technology

摘　　要：利用金相显微镜、扫描电镜、能谱分析仪、电子万能试验机等手段研究不同Al质量分数(1%、3%、5%)对Mg-1%Cu合金显微组织和力学性能的影响.结果表明:随着Al质量分数的增加,合金晶粒尺寸呈不断减小的趋势,并由块状组织转变为枝晶组织;合金抗拉强度随着Al质量分数的增加而逐渐增加,当Al质量分数为5%时,抗拉强度为207MPa;合金延伸率随着Al质量分数的增加呈先增大后减小的趋势,当Al质量分数为3%时,延伸率最大,为13.59%.The effect of different A1 mass-fractions （1%, 3%, 5%） on microstructure and mechanical properties of alloys Mg-l%Cu were investigated by means of metallographic microscope, SEM, EDS and electronic universal materials testing machine. The result showed that with the increase of A1 mass-frac- tion, the grain size of the alloy would continuously decrease, from block organization to dendrites and ten- sile strength of alloys increase gradually. When the mass-fraction of Al was 5%, the tensile strength would reach its maximum value of 207 MPa. With the increase of AI, elongation increased first and then decreased. When the content of AI was 3%, the elongation reached maximum value of 13. 59%.

关 键 词：铝 Mg-1%Cu镁合金 显微组织 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]