Analysis of Weld Formation Mechanism and Weld Pool Dynamic during Moving Laser-MIG Hybrid Welding

Abstract:

In order to better understand heat transfer and fluid flow pattern in the weld pool of laser-metal inert gas (MIG) hybrid welding aluminum-alloy process, weld formation mechanism and weld pool dynamic behavior were analyzed by a three-dimensional mathematical model for moving laser- MIG hybrid welding. The temperature and velocity distribution of weld longitudinal section for laser-MIG moving hybrid welding at different moment were discussed to explain flow dynamic behavior in the weld pool. In addition, weld formation mechanism was illustrated by a transverse section heat history evolvement. Moreover, the effects of laser welding parameter and MIG welding parameter on important weld geometry characteristic were quantitatively studied using the mathematical model, and the simulated weld bead geometry parameters were in good agreement with experimental measurements.

• Periodical: Applied Mechanics and Materials (Volumes 34-35)
• Pages: 33-43
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.34-35.33
• Online since: October 2010
• Authors: Zhi Guo Gao
• Keywords: Fluid Flow, Laser-MIG Hybrid Welding, Weld Formation, Weld Pool

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