Effect of friction stir processing on dynamic deformation behavior of Mg-2.67%Nd-0.5%Zn-0.5%Zr alloy

被引：0
|
作者：
Sha G.-Y. [1 ]
Lv Q.-Y. [1 ]
Yu T. [1 ]
Sun X.-G. [1 ]
Wang H.-S. [1 ]
机构：
[1] College of Materials Science and Engineering, Shenyang Institute of Aeronautical Engineering
来源：
Hangkong Cailiao Xuebao/Journal of Aeronautical Materials | 2010年 / 30卷 / 02期
关键词：
Friction Stir Processing; Mg-Nd-Zn-Zr alloy; Microstructure refinement; Strain rate;
D O I：
10.3969/j.issn.1005-5053.2010.2.007
中图分类号：
学科分类号：
摘要：
Mg-2.67%Nd-0.5%Zn-0.5%Zr alloy was treated with FSP technology with different parameters. The impact experiments for the alloy and FSP treated alloy were carried out using the Hopkinson Pressure Bar. The effects of FSP on the dynamic stress-strain behavior and its strain rate effects were analyzed. Results show the microstructure of the alloy after FSP treatment is refinement obviously because of dynamic recrystallization generate in the alloy, and the average grain size of this alloy from 60 μm reduced to below 10 μm. The dynamic stress-strain behavior of Mg-2.67%Nd-0.5%Zn-0.5%Zr alloy shows remarkable rate strengthening effect with strain rate increasing, but which of the alloy after FSP treatment is insensitive to strain rate under high-speed impact loading. This mainly results from obvious increasing of the deformation resistance for the alloy, which is induced because strengthening of grains refinement and small, dispersive precipitates in the alloy after FSP treatment.
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页码：35 / 39
页数：4
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