Effect of Scandium on Mechanical Properties of Al-6.5Zn-2.3Mg-2.0Cu-0.2Ce-0.1Zr Alloy

被引：0
|
作者：
Zuo P. [1 ]
Li F. [1 ]
Wang Y. [1 ]
Zhang H. [1 ]
Zhang S. [1 ]
Chen L. [1 ]
机构：
[1] School of Materials Science and Engineering, Shenyang University of Technology, Shenyang
来源：
Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | 2019年 / 37卷 / 06期
关键词：
Al-Zn-Mg-Cu-Ce-Zr alloy; Low-cycle fatigue performance; Tensile property;
D O I：
10.11785/S1000-4343.20190612
中图分类号：
学科分类号：
摘要：
The effect of Sc on the mechanical properties of hot-rolled Al-6.5Zn-2.3Mg-2.0Cu-0.2Ce-0.1Zr alloy subjected to the T6 treatment was investigated through performing the tensile test and low-cycle fatigue test. The results of tensile tests show that the ultimate tensile strength, yield strength and elongation of Al-6.5Zn-2.3Mg-2.0Cu-0.2Ce-0.1Zr-0.2Sc alloy are higher than those of Al-6.5Zn-2.3Mg-2.0Cu-0.2Ce-0.1Zr alloy. The results of low-cycle fatigue tests shows that the Al-6.5Zn-2.3Mg-2.0Cu-0.2Ce-0.1Zr(-0.2Sc) alloys exhibit the cyclic stability at the total strain amplitudes from 0.4% to 0.8%. The plastic strain amplitude and elastic strain amplitude of Al-6.5Zn-2.3Mg-2.0Cu-0.2Ce-0.1Zr(-0.2Sc) alloys show the linear relationship with the number of reversals to failure, which can be described by the Coffin-Manson equationand Basquin equation, respectively. The fatigue cracks initiate at the free surface of fatigue samples and propagate in a transgranular mode. © 2019, Editorial Office of Journal of the Chinese Society of Rare Earths. All right reserved.
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页码：730 / 738
页数：8
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