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Proceedings Paper

Modeling of high-power cw Nd:YAG laser welding
Author(s): Evelyne Dumord; Jean-Marie Jouvard; Dominique F. Grevey
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Paper 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.

Paper Details

Date Published: 30 September 1996
PDF: 8 pages
Proc. SPIE 2889, High-Power Lasers: Solid State, Gas, Excimer, and Other Advanced Lasers, (30 September 1996); doi: 10.1117/12.253255
Show Author Affiliations
Evelyne Dumord, LTM/IUT Le Creusot (France)
Jean-Marie Jouvard, LTM/IUT Le Creusot (France)
Dominique F. Grevey, LTM/IUT Le Creusot (France)

Published in SPIE Proceedings Vol. 2889:
High-Power Lasers: Solid State, Gas, Excimer, and Other Advanced Lasers
Sui-Sheng Mei; Keith A. Truesdell, Editor(s)

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