Numerical Analysis of Welding Residual Stress and Distortion in Laser+GMAW Hybrid Welding of Aluminum Alloy T-Joint
来源期刊：Acta Metallurgica Sinica2013年第3期
论文作者：Guoxiang XU Chuansong WU Xuezhou MA Xuyou WANG
文章页码：352 - 360
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.
Guoxiang XU1，Chuansong WU2，Xuezhou MA1，Xuyou WANG3
1. Key Laboratory of Advanced Welding Technology of Jiangsu Province, Jiangsu Univeristy of Science and Technology2. Institute of Advanced Welding Technology, Shandong University3. Harbin Welding Institute, China Academy of Machinery Science & Technology
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.
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