Influence of Zr on the microstructure and mechanical properties of an Al-Zn-Mg-Cu alloy

被引：2
|
作者：
Yang, Shoujie [1 ]
Xie, Youhua [1 ]
Dai, Shenglong [1 ]
Yan, Minggao [1 ]
机构：
[1] Inst Aeronaut Mat, PO Box 81-2, Beijing 100095, Peoples R China
来源：
2006 BIMW: 2006 BEIJING INTERNATIONAL MATERIALS WEEK, PTS 1-4: MAGNESIUM | 2007年 / 546-549卷
关键词：
super-high-strength; Al-Zn-Mg-Cu alloy; mechanical properties; microstructure; zirconium;
D O I：
10.4028/www.scientific.net/MSF.546-549.1069
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Recently, a new super-high-strength Al-Zn-Mg-Cu alloy with Zr bearing was developed in BIAM. In this paper, the effect of microalloying element Zr on the microstructure and mechanical properties of the alloy was investigated. It was found that the influence of Zr on the microstructure and age-hardening behaviors was remarkable. The strength of the alloy increases with increasing the content of zirconium, and the peak value of the elongation appeared when the content of Zr was 0.06%(mass fraction) and then decreases. The fracture behavior was also studied. The result shows that the fracture mechanism of the alloy was converted from intergranular brittle to transgranular ductile model with increasing the content of zirconium. Finally, the optimum contents of Zr in the alloy were proposed as 0.10%similar to 0.14%.
引用
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页码：1069 / +
页数：2
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