Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第18卷    第9期    总第114期    2008年9月

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文章编号:1004-0609(2008)09-1602-05
铸造Mg-Zr-Er-Zn合金的力学性能和阻尼行为
刘楚明1, 2,邱从章1喆,常亚3,李慧中1,王孟君1, 4,王 荣2

(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

Mechanical properties and damping capacity of cast Mg-Zr-Er-Zn alloy
LIU Chu-ming1, 2, QIU Cong-zhang1, CHANG Ya-zhe3, LI Hui-zhong1, WANG Meng-jun1, 4, WANG Rong2

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

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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