铸态Mg-Zn-Er-Zr合金显微组织和力学性能的研究  

Research on Microstructure and Mechanical Properties of Mg-Zn-Er-Zr Alloy As-cast

作　　者：邱从章[1] 刘楚明[1] 常亚喆[1] 李慧中[1] 王孟君[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《热加工工艺》2008年第14期39-41,共3页Hot Working Technology

摘　　要：通过显微组织观察和力学性能测试等手段研究了铸态Mg-Zn-Er-Zr合金的组织和力学性能。结果表明,添加0.6%Er+1%Zn,在晶界处形成Mg-Zn、Mg-Er、Mg-Er-Zn的质点阻碍了枝晶生长,起到细化晶粒的作用,晶粒尺寸减小到60μm左右,抗拉强度、屈服强度和伸长率分别达到198.8MPa、83.0MPa和24.5%,较Mg-0.6Zr合金均有不同程度的提高。The microstructure and mechanical properties of Mg-Zn-Er -Zr alloy as-cast was investigated by microstructure observation and property testing. The results show that adding 0.6%Er ＋ l%Zn in the Mg-0.6Zr, the compounds of Mg-Er, Mg-Zn and Mg-Er-Zn restrain the crystal grain to grow up, and the grain observably fines about 60μm. The δ0 δ02 and δ of the Mg-1Zn-0.6Er-0.6Zr alloy is up to 198.8MPa, 83.0 MPa and 24.5% respectively. The mechanical properties significantly improve compared with Mg-0.6Zr alloy.

关 键 词：Mg-Zn—Er—Zr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]