Study on microstructures of friction stir welded joint of 1561 aluminum alloy

被引：0

作者：

Dong C. ^{[1
]}

Zhao Y. ^{[1
]}

Wen L. ^{[1
,2
]}

Zhang P. ^{[2
]}

机构：

[1] Guangdong Provincial Key Laboratory of Advanced Welding Technology, Guangzhou

[2] Guangdong University of Technology, Guangzhou

来源：

Zhao, Yunqiang (zhaoyq@gwi.gd.cn) | 1600年 / Harbin Research Institute of Welding卷 / 41期

关键词：

1561 aluminum alloy; Friction stir welding; Mechanical property;

D O I：

10.12073/j.hjxb.20200618003

中图分类号：

学科分类号：

摘要：

4 mm thick 1561 aluminum alloy was friction stir welded by the constant pressure controlling mode, and the microstructures of the FSW joint were studied. The results showed that the grain size first increased and then gradually decreased from the base material to the weld center, and the low-angle boundary proportion and the dislocation density continued to decrease. In HAZ, the grains grew under the action of the welding thermal cycle. The grains in TMAZ were composed of elongated grains and fine equiaxed crystals, and partial dynamic recrystallization occurred in this zone. The grains in SZ were fine equiaxed, indicating that complete dynamic recrystallization occurred. Compared with the precipitates with smaller number and larger size in the base metal zone, there were a large number of Al6Mn phases with smaller size in the SZ, indicating that the precipitates in this zone dissolved first and then precipitated. At the same time, there were obvious substructures such as dislocation walls and subgrain boundaries in the SZ. This indicated that continuous dynamic recrystallization occurred. The Al6Mn phase mainly distributed on the dislocations in the SZ, and this could pin the dislocations and hinder the growth of recrystallized grains. Copyright © 2020 Transactions of the China Welding Institution. All rights reserved.

引用

页码：1 / 5

页数：4

共 14 条

[1] Hirata T, Oguri T, Hagino H, Et al., Influence of friction stir welding parameters on grain size and formability in 5083 aluminum alloy, Materials Science & Engineering A, 456, 1−2, pp. 344-349, (2007)
[2] Imam M, Sun Y, Fujii H, Et al., Deformation characteristics and microstructural evolution in friction stir welding of thick 5083 aluminum alloy, The International Journal of Advanced Manufacturing Technology, 99, 1−4, pp. 663-681, (2018)
[3] Yan Dejun, Wang Sai, Zheng Wenjian, Et al., Control of welding distortion by welding with trailing cooling of drikold of 1561 aluminum alloy thin sheet, Journal of Mechanical Engineering, 55, 6, pp. 67-73, (2019)
[4] Wen Linxiu, Zhao Yunqiang, Dong Chunlin, Et al., Study on characteristics of welding pressure, microstructures and mechanical properties of friction stir welded 1561 aluminum alloy, Transactions of the China Welding Institution, 40, 12, pp. 91-96, (2019)
[5] Han Shanguo, Yan Dejun, Liu Xiaoli, Et al., Analysis of microstructure and mechanical properties of 1561 aluminum alloy TIG welded joint, Welding Technology, 44, 1, pp. 18-21, (2015)
[6] Yan Dejun, Han Duanfeng, Wang Yi, Et al., Microstructure and mechanical properties of 1561 aluminum alloy joints made by double-sided arc welding, The Chinese Journal of Nonferrous Metals, 26, 10, pp. 2065-2070, (2016)
[7] Liu Weiliang, Study on pore sensitivity in transverse welding of Al-Mg alloy, (2017)
[8] Wang Xijing, Sun Guiping, Zhang Jie, Et al., Effect of heat treatment on microstructure and properties of thermomechanical affected zone of high-strength aluminum alloy, The Chinese Journal of Nonferrous Metals, 3, pp. 484-489, (2009)
[9] Liu H, Hu Y, Dou C, Et al., An effect of the rotation speed on microstructure and mechanical properties of the friction stir welded 2060-T8 Al-Li alloy, Materials Characterization, 123, pp. 9-19, (2017)
[10] Sun H Y, Zhou Q, Zhu J, Et al., Deformation analysis of a friction stir-welded thin sheet aluminum alloy joint, China Welding, 29, 1, pp. 56-62, (2020)

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