Abstract
Hybrid welding of stainless steels or aluminum alloys was performed using the heat
sources of YAG laser and TIG, or YAG laser and MIG, respectively. The effects of welding
conditions and melt flows on penetration depth, weld bead geometry and bubble/porosity formation
were investigated with X-ray transmission real-time observation method. A great effect of melt
flows on penetration depth and weld geometry was consequently confirmed. Concerning porosity
suppression in YAG-TIG hybrid welding of stainless steel, no bubble generation was attributed to
no porosity formation. On the other hand, it was revealed that the disappearance of bubbles from
the concave molten pool surface played an important role of no porosity in YAG laser-MIG hybrid
welding of aluminum alloys.
Publisher
Trans Tech Publications, Ltd.
Subject
Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics
Cited by
4 articles.
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