Process and Mechanism of Novel Heat Treatment for Controlling Residual Stress in Al-Cu-Mg Alloy

被引：0
|
作者：
Ma W. [1 ]
Chen Z. [1 ,2 ]
Li H. [2 ]
Yuan Z. [1 ]
Zheng Z. [2 ]
机构：
[1] School of Materials Science and Engineering, Central South University, Changsha
[2] Department of Materials Engineering, Hunan University of Humanities, Science and Technology, Loudi
来源：
Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2019年 / 33卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Al-Cu-Mg; Mechanical properties; Metallic materials; Microstructure; Novel heat treatment; Residual stresses;
D O I：
10.11901/1005.3093.2018.626
中图分类号：
学科分类号：
摘要：
The influence of a novel heat treatment process for reducing residual stress on the microstructure evolution and mechanical properties of Al-Cu-Mg alloy was investigated by means of transmission electron microscope, scanning electron microscope, X-ray diffractometer and tensile test. The results show that the residual stress reduction rate of Al-Cu-Mg alloy (compared with the solid solution treated one) reaches 92.7% by the novel heat treatment, while an excellent combination of strength and plasticity was acquired. As a result, the yield strength, ultimate tensile strength and the elongation rate of the alloy can reach 463.6 MPa, 502.5 MPa and 12.7% respectively. TEM observations reveal that the S' precipitates are fine and uniformly distributed in the microstructure after the novel heat treatment. The synergistic effect of the coherency stress field produced by these S' phases and the quenching residual stress field may result in a significant reduction of the residual stress, which gives rise to the high comprehensive properties of Al-Cu-Mg alloy. © All right reserved.
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页码：435 / 442
页数：7
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