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Influence of the laser radiation on the plasma dynamics during arc-laser welding

 
: Aden, M.; Kreutz, E.W.; Hausen, O.; Poprawe, R.

Beyer, E. ; Laser Institute of America -LIA-:
Laser Materials Processing Conference 1998. Proceedings. Vol. 1
Orlando, Fla.: LIA, 1998 (LIA 85A)
ISBN: 0-912035-58-7
pp.C/139-C/148 : Ill., Lit.
International Congress on Applications of Lasers and Electro Optics (ICALEO) <1998, Orlando/Fla.>
Laser Materials Processing Conference <1998, Orlando/Fla.>
English
Conference Paper
Fraunhofer ILT ()

Abstract
The temperature distribution of the plasma plume occuring during TIG-arc- and Nd:YAGlaser- arc (hybrid) welding of steel (St 52) and aluminum alloy (AlMg3) is measured using emission spectroscopy. For steel the temperature distribution differs for arc- and the hybrid welding. For the aluminum alloy only laser-arc welding gives a stable plasma plume, which is similar to the temperature distribution of the plume occuring during arc welding of steel. A model is established to simulate the dynamics of the plume incorporating the anode fall region and the evaporation from the laser-induced keyhole. It is used to calculate the temperature, the current density and the velocity field of the plume for the processing of iron and aluminum.

: http://publica.fraunhofer.de/documents/B-61691.html