Numerical simulation of fiber laser welding of steel/aluminum dissimilar metals
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State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China
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Corresponding author:
JIN Xiangzhong, jxz2014@hnu.edu.cn
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Received Date:
2015-04-15
Accepted Date:
2015-05-20
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Abstract
In order to study the temperature distribution for laser butt welding of dissimilar metal steel/aluminum, a mathematical model was established and welding temperature field was also simulated by ANSYS software. Temperature distribution at different time and the thermal cycling profile at the node on specimen surface were obtained. The effect of welding speed on welding temperature field was studied. The results were compared with the actual welding. The results show that, the welding temperature field is asymmetrically distributed and the temperature gradient in steel side is greater than that in aluminum side; With the increase of welding speed, the maximum temperature reduces gradually and weld width also decreases gradually. The weld shapes obtained from simulation and experiments are consistent, and the error is less than 5%. The study can verify the accuracy of simulation results.
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