Numerical simulation of the temperature field of laser butt welding of titanium alloy sheet

LIU Xi-xia; HUANG Rui; YAO Gang; PENG Ji-zhong; ZHANG Yi

doi:10.7510/jgjs.issn.1001-3806.2013.05.030

In order to analyze the laser butt welding process of Ti6Al4V(TC4)alloy sheet, a nonlinear transient heat conduction model was established by means of the finite element analysis and the distribution of the 3-D transient temperature was calculated with ANSYS. In the process, it was taken into account that the material thermophysical properties varied with temperature, and the loading and moving of the Gaussian heat source were realized using the APDL programming languages. The results show that the temperature field changes from non-steady state to state, and eventually present a stable meteor-shape distribution, the isotherms are dense near the weld and the heat affected zone is narrow. The simulated weld profile matches well with the experiment result. According to the simulation results, the dimension of the area where temperature is above 400℃ is 42.00mm10.56mm. The study proved the correctness of the simulation method, and provided references for the design of welding protection device.

Numerical simulation of the temperature field of laser butt welding of titanium alloy sheet

Corresponding author: ZHANG Yi, zy2100_hn@yahoo.com.cn

1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;

2. Chengdu Aircraft Industrial Group Co., Ltd., Aviation Industry Corporation of China, Chengdu 610092, China

Received Date: 2012-12-17

Accepted Date: 2013-01-22

Available Online: 2013-09-25

Abstract: In order to analyze the laser butt welding process of Ti6Al4V(TC4)alloy sheet, a nonlinear transient heat conduction model was established by means of the finite element analysis and the distribution of the 3-D transient temperature was calculated with ANSYS. In the process, it was taken into account that the material thermophysical properties varied with temperature, and the loading and moving of the Gaussian heat source were realized using the APDL programming languages. The results show that the temperature field changes from non-steady state to state, and eventually present a stable meteor-shape distribution, the isotherms are dense near the weld and the heat affected zone is narrow. The simulated weld profile matches well with the experiment result. According to the simulation results, the dimension of the area where temperature is above 400℃ is 42.00mm10.56mm. The study proved the correctness of the simulation method, and provided references for the design of welding protection device.

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Reference (16)

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Numerical simulation of the temperature field of laser butt welding of titanium alloy sheet

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