Modelling of the welding profile and the vapor cavity of a laser welded Al 5182 alloy
DOI:
https://doi.org/10.3989/revmetalm.2001.v37.i6.532Keywords:
Aluminum alloys, Nd, YAG laser, Welding, Modeling, Keyhole,Abstract
The purpose of this research is the study of the laser welding process of the aluminum alloy 5182 and the development of models by means of the COSMOS/M package, in order to predict the shape of the keyhole and the temperatures profile of the weld. Modeling has been done considering the degree of defocusing. The heat flow applied on the models was a Gauss flow, considering the condition of the focused face and the conditions of negative and positive defocusing. The validity of the models has been demonstrated comparing their results with those obtained by experimental tests. The extent of defocusing of laser beam affected the stability of the keyhole and welding geometry.
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