Study on keyhole coupling and melt flow dynamic behaviors simulation of 2219 aluminum alloy T-joint during the dual laser beam bilateral synchronous welding
作者： Shuai Chen , Yanqiu Zhao , Shuhao Tian , Yuanzhi Gu , Xiaohong Zhan
DOI: 10.1016/J.JMAPRO.2020.10.063
关键词:
摘要: Abstract In this research, the keyhole coupling and melt flow behaviors of 2219 aluminum alloy T-joint during dual laser beam bilateral synchronous welding (DLBSW) process are investigated by simulation, which involves fluid heat transfer flow. The calculated mesh model is established simplifying equal boss skin. combined Gaussian source adopted to simulate energy loaded on base metal process. obtained simulation results reliably matched with experimental results. Subsequently, not only two keyholes evolution characteristics coupled analyzed, but also molten pool liquid studied in detail. demonstrate that profile’s oscillations continuously exist, whether before or after coupling. direction near wall includes parallel around wall. Besides, maximum depth slightly lags behind rear keyhole. On surface, velocities significantly greater than inside pool. vortexes produced upper lower regions
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