Modeling of high-power cw Nd:YAG laser welding

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

doi:10.1117/12.273674

2 May 1997 Modeling of high-power cw Nd:YAG laser welding

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

Proceedings Volume 2989, Modeling and Simulation of Higher-Power Laser Systems IV; (1997) https://doi.org/10.1117/12.273674
Event: Photonics West '97, 1997, San Jose, CA, United States

Abstract

The model developed allows us 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 pressures 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 absorption 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 2989, Modeling and Simulation of Higher-Power Laser Systems IV, (2 May 1997); https://doi.org/10.1117/12.273674

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