Influence of superimposed intensity distributions on the welding process and the spatter behavior during laser welding of steel
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The influence of superimposed intensity distributions on the resulting melt flows, capillary shapes, and generated spatters during laser beam welding of mild steel was investigated using online high-speed X-ray imaging and visual high-speed imaging. The shape of the capillary changed for different superimposed intensity distributions and the size of the eddies in the melt pool changed for welds with different amounts of generated spatters. For a high number of generated spatters, a higher number of trajectories of the tracer particles leading to the upper part of the melt at the rear side of the capillary was observed, which was also the location of the generation of the spatters.
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