abstract

• To investigate the infuence of temperature dependant material properties on model results, 2D FEM calculations for thin sheets of AA5182 aluminium alloy were compared with real-time coaxial camera images of the laser welding process. The results show the importance of taking into account the latent heat of the solid-liquid phase transition in the model. Including temperature dependant values of the thermal conductivity and the specific heat slightly improved the model accuracy. The tendency of a shortening melt pool for higher values of the laser power could not be explained by this 2D model and is expected to be caused by a changing keyhole shape. In the FEM model results, the melt flow shows a clear recirculation with melt flowing forward on the centerline, from the tail region towards the keyhole.

authors

• Aalderink B.J.
• Aarts R.G.K.M.
• De Lange Dirk Frederik
• Meijer J.

publication date

• 2006-01-01

published in

• ICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics, Congress Proceedings  Proceedings

keywords

• Aluminum alloys; Electric welding; Laser beam welding; Specific heat; Thermal conductivity; Experimental verification; FEM calculation; Model accuracy; Model results; Physical modelling; Recirculations; Solid-liquid phase transitions; Welding process; Laser materials processing

Digital Object Identifier (DOI)

• 10.2351/1.5060848

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