铸造Mg-Zr-Er-Zn合金的力学性能和阻尼行为
来源期刊:中国有色金属学报2008年第9期
论文作者:刘楚明 邱从章 常亚喆 李慧中 王孟君 王荣
文章页码:1602 - 1606
关键词:Mg-Zr-Er-Zn合金;晶粒细化;阻尼行为;力学性能
Key words:Mg-Zr-Er-Zn alloy; grain refinement; damping capacity; mechanical properties
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60 μm左右,抗拉强度、屈服强度和伸长率分别达到198.8 MPa、83.0 MPa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。
Abstract: The mechanical properties and dumping capacities of Mg-0.6Zr-0.6Er-1Zn 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%.