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

被引:0
作者
Lu C.-H. [1 ]
Zheng Y.-Y. [2 ]
He J.-L. [1 ]
Wang C.-L. [1 ]
Chen Z.-G. [1 ,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
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2023年 / 33卷 / 04期
基金
中国国家自然科学基金;
关键词
Al-Cu-Mg alloy; fatigue crack growth; mechanical property; synergistic regulation; thermo-mechanical treatment;
D O I
10.11817/j.ysxb.1004.0609.2022-42875
中图分类号
学科分类号
摘要
The effects and control mechanism of the novel thermo-mechanical treatment (NTMT) on the microstructure and properties of Al-Cu-Mg alloy were investigated by X-ray diffractometry (XRD), transmission electron microscopy (TEM), tensile test and fatigue crack growth test. The results show that Al-Cu-Mg alloy treated by NTMT can obtain a good combination of strength and ductility, and under the condition of high elongation (11.3%), the tensile strength and yield strength can reach 516.7 MPa and 475.3 MPa, respectively. During NTMT, the introduction of shear texture and Goss grains with large tilting and torsional angle grain boundaries significantly can improve the resistance of fatigue crack growth of the alloy. The crack closure effect reduces the stress intensity factor range of effective crack tip and retards the fatigue crack growth rate. The NTMT can significantly improve the mechanical performance of the alloy by synergistic regulation of the precipitated phase, dislocation and texture configuration. The texture evolution of the process includes the formation and transformation of Cube texture and Goss texture, the formation of rolling texture such as Brass texture, Copper texture and S texture, and the formation of shear texture. © 2023 Central South University of Technology. All rights reserved.
引用
收藏
页码:997 / 1010
页数:13
相关论文
共 32 条
  • [1] FU Jun-wei, CUI Kai, WANG Jiang-chun, Recent development in Al-Cu series heat-resistant aluminum alloys, The Chinese Journal of Nonferrous Metals, 31, 7, (2021)
  • [2] STEMPER L, TUNES M A, TOSONE R, Et al., On the potential of aluminum crossover alloys, Progress in Materials Science, 124, (2022)
  • [3] DENG Yun-lai, ZHANG Xin-ming, Development of aluminum and aluminum alloy, The Chinese Journal of Nonferrous Metals, 29, 9, pp. 2115-2141, (2019)
  • [4] AZZEDDINE H, BRADAI D, BAUDIN T, Et al., Texture evolution in high-pressure torsion processing, Progress in Materials Science, 125, (2022)
  • [5] WANG Z, LIN X, TANG Y, Et al., Laser-based directed energy deposition of novel Sc/Zr-modified Al-Mg alloys: Columnar-to-equiaxed transition and aging hardening behavior[J], Journal of Materials Science & Technology, 69, (2021)
  • [6] ZHONG Xiao-xiao, YANG Zhi-gang, ZHANG Yao, Et al., Microstructure and mechanical property evolution and fracture behavior of 2A12 aluminum alloy subjected to high pressure torsion, The Chinese Journal of Nonferrous Metals, 31, 1, (2021)
  • [7] LI Bin, DONG Li-hong, WANG Hai-dou, Et al., Research progress on corrosion fatigue of aerospace aluminum alloy, Surface Technology, 50, 7, (2021)
  • [8] CHEN J, ZOU L, CHEN Y, Et al., Effect of stress on precipitation behaviour of 7xxx alloy during age forming process[J], Materials Science and Technology, 32, 1, (2016)
  • [9] CHEN J, ZOU L, LI Q, Et al., Microstructure evolution of 7050 Al alloy during age-forming[J], Materials Characterization, 102, (2015)
  • [10] CHEN J, ZHANG X, ZOU L, Et al., Effect of precipitate state on the stress corrosion behavior of 7050 aluminum alloy[J], Materials Characterization, 114, (2016)