Control mechanism of thermo-mechanical treatment on microstructure and mechanical properties of Al-Cu-Mg alloy

被引：0

作者：

Wang C. ^{[1
]}

Liu H. ^{[2
]}

Zheng Y. ^{[2
]}

Wang K. ^{[1
]}

Chen Z. ^{[1
,2
]}

机构：

[1] School of Materials Science and Engineering, Central South University, Changsha

[2] Department of Materials and Environmental Engineering, Hunan University of Humanities, Science and Technology, Loudi

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2024年 / 34卷 / 01期

关键词：

Al-Cu-Mg alloy; fatigue crack growth rate; microstructure; tensile mechanical property; thermo-mechanical treatment;

D O I：

10.11817/j.ysxb.1004.0609.2023-44378

中图分类号：

学科分类号：

摘要：

The effects of novel thermo-mechanical treatment (NTMT) process on the microstructure and macroscopic properties of Al-Cu-Mg alloy were investigated by means of X-ray diffractometer(XRD), transmission electron microscope (TEM), tensile mechanical properties test and fatigue crack growth rate test. The results show that the NTMT process can enable the mechanical properties of Al-Cu-Mg alloy achieve a good combination of strength and plasticity. Using solution hot rolling with 25% reduction, the asymmetric cryorolling with 30% reduction (r2) and the artificial aging at 100 ℃ for 6 h, the elongation is 10.1%, and the tensile strength and yield strength of Al-Cu-Mg alloy are 517.2 MPa and 448.3 MPa, respectively, which are 74.8 MPa and 98.6 MPa higher than those of the conventional T6 Al-Cu-Mg alloy. The NTMT process causes a large number of dislocation tangles and small S phases in the alloy. The high-strength Goss texture and a large number of shear textures improve the fatigue performance of the alloy by affecting the deflection of fatigue cracks. © 2024 Central South University of Technology. All rights reserved.

引用

页码：5 / 62

页数：57

共 45 条

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