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Proceedings Paper

Keyhole: modeling during 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, form 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 the heated area is enlarged. More a spectrometric characterization indicates that no ionized particles exist in the plume and certainly in the keyhole. So Fresnel absorptions are the predominant effects for energy absorption in the keyhole. This assumption is verified owing to Fresnel absorption coefficient measurements.

Paper Details

Date Published: 23 September 1996
PDF: 8 pages
Proc. SPIE 2789, High-Power Lasers: Applications and Emerging Applications, (23 September 1996); doi: 10.1117/12.251180
Show Author Affiliations
Evelyne Dumord, IUT Le Creusot (France)
Jean-Marie Jouvard, IUT Le Creusot (France)
Dominique F. Grevey, IUT Le Creusot (France)

Published in SPIE Proceedings Vol. 2789:
High-Power Lasers: Applications and Emerging Applications
Georges Sayegh; Michael R. Osborne, Editor(s)

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