(1. 中南大学 材料科学与工程学院，长沙 410083；
2. 中国兵器科学研究院 宁波分院，宁波 315103；
3. 中国空空导弹研究院，洛阳 471009；
4. 华中科技大学 模具技术国家重点实验室，武汉 430074)
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。
关键字: Mg-Zr-Er-Zn合金；晶粒细化；阻尼行为；力学性能
（1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Ningbo Branch, Ordnance Science Institute of China, Ningbo 315103, China;
3. China Airborne Missile Academy, Luoyang 471009, China;
4. State Key Laboratory of Material Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China）
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%.
Key words: Mg-Zr-Er-Zn alloy; grain refinement; damping capacity; mechanical properties
