Effect of welding residual stress on bearing capacity of fusion welded joint of 2219 aluminum alloy

被引：0

作者：

Xu X. ^{[1
,2
]}

Liang X. ^{[3
]}

Yang R. ^{[3
]}

Yan D. ^{[3
]}

Zhou L. ^{[1
,2
]}

机构：

[1] State Key Laboratory of Advanced Welding and Connection, Harbin Institute of Technology, Harbin

[2] Shandong Key Laboratory of Special Welding Technology, Harbin Institute of Technology (Weihai), Weihai

[3] Beijing Institute of Aerospace Systems Engineering, Beijing

来源：

Hanjie Xuebao/Transactions of the China Welding Institution | 2020年 / 41卷 / 10期

关键词：

Aluminum alloy; Mechanical properties; Mesoscopic damage; Residual stress;

D O I：

10.12073/j.hjxb.20200403004

中图分类号：

学科分类号：

摘要：

To study the specific effect of welding residual stress on the bearing capacity of 2219 aluminum alloy and its mechanism, the mechanical properties of the two welded joints were tested by comparative tests. The finite element model of welding process was established, and the residual stress distribution of standard specimen and large-sized specimen was obtained. The simulation results showed that the welding residual stress was basically released during the preparation of standard samples. The mechanical tensile and joint characterization tests of specimens with and without residual stress were carried out respectively. The test results indicated that the existence of welding residual stress has no obvious effects on the mechanical properties, fracture forms and fracture characteristics of welded joints. Based on the theory of the fracture mechanics of mesoscopic damage, the mechanism of the damage and the accumulation of the residual stress in the joint was analyzed and discussed in detail. The results revealed that the released stress after the formation of the welded joint does not affect the bearing capacity of the joint, but the additional plastic strain which caused by the residual stress control measures during and after welding, which may have an impact on the bearing capacity of the joint. Copyright © 2020 Transactions of the China Welding Institution. All rights reserved.

引用

页码：17 / 22

页数：5

共 18 条

[1] Xue Caijun, Xu Jiangbo, Liang Heng, Et al., Microstructure of 2219 aluminum alloy weld and its effect on mechanical properties, Journal of Nanjing University of Science and Technology, 37, 1, pp. 145-149, (2013)
[2] Gayle F W, Goodway M., Precipitation hardening in the first aerospace aluminum alloy: the wright flyer crankcase, Science, 266, 5187, pp. 1015-1017, (1994)
[3] Williams J C., Progress in structural materials for aerospace systems1, Acta Materialia, 51, 19, pp. 5775-5799, (2003)
[4] Li Quan, Study on weak zone of mechanical properties of 2219 aluminum alloy melting welded joint, (2015)
[5] Withers P J, Bhadeshia H K D H., Residual stress. Part 1-measurement techniques, Materials Science and Technology, 17, 4, pp. 355-365, (2001)
[6] Zang Shukui, Luo Zhiting, Analysis of welding residual stress and its elimination method, Metallurgical Power, 6, pp. 38-41, (1996)
[7] Li Dong, Effect of ultrasonic impact on welding residual stress and deformation, (2017)
[8] He Bolin, Lei Siyong, Research progress on the effect of ultrasonic impact on welding residual stress, Weapons Materials Science and Engineering, 38, 2, pp. 120-123, (2015)
[9] Wen Zhi Jie, Study on eliminating welding stress of cast iron by hammering method, (2011)
[10] Wang Bin, Liu Hanwei, Li Qinqin, Et al., Effect of high frequency induction heating on residual stress of 2219 aluminum alloy FSW welded joint, Welding Machine, 49, 5, pp. 59-63, (2019)

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