(1. 中南大學(xué) 材料科學(xué)與工程學(xué)院，長(zhǎng)沙 410083；
2. 中國(guó)兵器科學(xué)研究院 寧波分院，寧波 315103；
3. 中國(guó)空空導(dǎo)彈研究院，洛陽 471009；
4. 華中科技大學(xué) 模具技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室，武漢 430074)
摘 要: 通過電子顯微鏡、阻尼性能和力學(xué)性能測(cè)試等研究Mg-0.6Zr-0.6Er-1Zn合金力學(xué)性能和阻尼行為。結(jié)果表明：加入0.6%Er+1%Zn后，在晶界附近存在含Er和Zn的質(zhì)點(diǎn)減緩了枝晶生長(zhǎng)，起到細(xì)化Mg-0.6Zr合金組織的作用，使得其晶粒尺寸減小至60 µm左右，抗拉強(qiáng)度、屈服強(qiáng)度和伸長(zhǎng)率分別達(dá)到198.8 MPa、83.0 MPa和24.5%，較Mg-0.6Zr合金均有不同程度的提高，且比阻尼為48.1%，仍具有較高的阻尼性能。
關(guān)鍵字: Mg-Zr-Er-Zn合金；晶粒細(xì)化；阻尼行為；力學(xué)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
