Modeling of high-power cw Nd:YAG laser welding

Evelyne Dumord; Jean-Marie Jouvard; Dominique F. Grevey

doi:10.1117/12.253255

30 September 1996 Modeling of high-power cw Nd:YAG laser welding

Evelyne Dumord, Jean-Marie Jouvard, Dominique F. Grevey

Proceedings Volume 2889, High-Power Lasers: Solid State, Gas, Excimer, and Other Advanced Lasers; (1996) https://doi.org/10.1117/12.253255
Event: Photonics China '96, 1996, Beijing, China

Abstract

The model developed allows to know the temperature field in a cw Nd:YAG laser joining piece. To realize the model, a physical approach has been used for defining the heat sources. First, from a pressure balance the geometry of the keyhole is determined. Then, an analysis of the plume existing at the surface of the target shows that the beam is scattered by the plume and consequently one more heat source must be considered. The spectrometric characterization indicates that no ionized particles exist in the plume and certainly in the keyhole. So Fresnel absorptions must be the predominant effects for energy absorption in the keyhole. This assumption has been verified owing to Fresnel absorption coefficient measurements.

Citation Download Citation

Evelyne Dumord, Jean-Marie Jouvard, and Dominique F. Grevey "Modeling of high-power cw Nd:YAG laser welding", Proc. SPIE 2889, High-Power Lasers: Solid State, Gas, Excimer, and Other Advanced Lasers, (30 September 1996); https://doi.org/10.1117/12.253255

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