Acta Metallurgica Sinica (English Letters) >
Numerical Analysis of Welding Residual Stress and Distortion in Laser+GMAW Hybrid Welding of Aluminum Alloy T-Joint
Received date: 2012-09-19
Revised date: 2013-01-23
Online published: 2013-05-06
Supported by
Sino-Russian Cooperation Research Project of China (No. 2009DFR50170), the National Natural Science Foundation of China (No. 51105182) and the College Natural Science Foundation of Jiangsu Province (No. 11KJB460004).
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 XU , Chuansong WU , Xuezhou MA , Xuyou WANG . Numerical Analysis of Welding Residual Stress and Distortion in Laser+GMAW Hybrid Welding of Aluminum Alloy T-Joint[J]. Acta Metallurgica Sinica (English Letters), 2013 , 26(3) : 352 -360 . DOI: 10.1007/s40195-012-0166-5
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