High damping capacities of Mg-Cu based alloys

被引：4
|
作者：
Wan D.-Q. [1 ]
He B.-L. [1 ]
Xiong G.-Y. [1 ]
Chen Z.-X. [1 ]
Wang J.-C. [2 ]
Yang G.-C. [2 ]
机构：
[1] School of Mechanical and Electronical Engineering, East China Jiaotong University
[2] State Key Laboratory of Solidification Processing, Northwestern Polytechnical University
来源：
Transactions of Nonferrous Metals Society of China (English Edition) | 2010年 / 20卷 / SUPPL. 2期
基金：
中国国家自然科学基金;
关键词：
damping mechanism; damping peaks; high damping; Mg-Cu based alloys; microstructure;
D O I：
10.1016/S1003-6326(10)60516-X
中图分类号：
学科分类号：
摘要：
The dynamic mechanical analyzer (DMA) was applied to investigate the damping properties of Mg-Cu based alloys. The results show that the as-cast hypoeutectic Mg-Cu binary alloys exhibit ultra-high damping capacities, while the eutectic Mg-Cu alloy exhibits low damping capacity. The strain amplitude dependent damping performance reveals that the dislocation damping mainly dominates in Mg-Cu alloys. Furthermore, the influence of eutectic phase on damping mechanisms of Mg-Cu binary alloys was discussed in detail and the effect of Si addition on the damping of Mg-1%Cu based alloy was also reported. Two damping peaks are observed on the temperature dependent spectrum of Mg-Cu based alloys. One is located at room temperature, which is dislocation related peak; and the other is located at moderate temperature, which is caused by the grain boundary sliding. © 2010 The Nonferrous Metals Society of China.
引用
收藏
页码：s448 / s452
页数：4
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