标题：Numerical Analysis of Welding Residual Stress and Distortion in Laser plus GMAW Hybrid Welding of Aluminum Alloy T-Joint
作者：Xu, Guoxiang; Wu, Chuansong; Ma, Xuezhou; Wang, Xuyou
作者机构：[Xu Guoxiang] Jiangsu Univeristy of Science and Technology, Key Laboratory of Advanced Welding Technology of Jiangsu Province, Zhenjiang, Jiangsu 2120 更多
通讯作者地址：[Xu, GX]Jiangsu Univ Sci & Technol, Key Lab Adv Welding Technol Jiangsu Prov, Zhenjiang 212003, Peoples R China.
来源：ACTA METALLURGICA SINICA-ENGLISH LETTERS
关键词：Hybrid welding; Residual stress; Welding distortion; Aluminum alloy; T-joint; Numerical simulation
摘要：A 3-D finite element model is developed to predict the temperature field and thermally induced residual stress and distortion in laser+GMAW hybrid welding of 6061-T6 aluminum alloy T-joint. And the characteristics of residual stress distribution and deformation are numerically investigated. In the simulation, the heat source model takes into account the effect of joint geometric shape and welding torch slant on the heat flux distribution and a sequentially coupled thermo-mechanical method is used. The calculated results show that higher residual stress is distributed in and surround the weld zone. Its peak value is very close to the yield strength of base metal. Besides, a large deformation appears in the middle and rear part of the weldment.