铸造Mg-Zr-Er-Zn合金的力学性能和阻尼行为  

Mechanical properties and damping capacity of cast Mg-Zr-Er-Zn alloy

作　　者：刘楚明[1] 邱从章[1] 常亚喆[2] 李慧中[1] 王孟君[1] 王荣[3] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]中国空空导弹研究院,洛阳471009 [3]中国兵器科学研究院宁波分院,宁波315103

出　　处：《中国有色金属学报》2008年第9期1602-1606,共5页The Chinese Journal of Nonferrous Metals

基　　金：国防重大基础研究资助项目

摘　　要：通过电子显微镜、阻尼性能和力学性能测试等研究Mg-0.6Zr-0.6Er-1Zn合金力学性能和阻尼行为。结果表明:加入0.6%Er+1%Zn后,在晶界附近存在含Er和Zn的质点减缓了枝晶生长,起到细化Mg-0.6Zr合金组织的作用,使得其晶粒尺寸减小至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,且比阻尼为48.1%,仍具有较高的阻尼性能。The mechanical properties and dumping capacities of Mg-0.6Zr-0.6Er-lZn alloys were investigated by SEM, damping capacity test and mechanical property test. The results show that adding 0.6%Er and 1%Zn in the Mg-0.6Zr, the compounds of Mg-Er, Mg-Zn and Mg-Er-Zn restrain the crystal brain growing up, and the grains are observably refined to about 60 μm. σb, σ0.2 and elongation of Mg-0.6Zr-0.6Er-1Zn alloy increase to 198.8 MPa, 83.0 MPa and 24.5%, respectively. The mechanical properties of Mg-0.6Zr alloys can be significantly improved by Er and Zn microalloying, and the alloy still maintains a rather high damping capacity with specific damping capacity of 48.1%.

关 键 词：Mg—Zr-Er-Zn合金 晶粒细化 阻尼行为:力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]