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Proceedings Paper

Time resolved CO2-metal coupling determination for solid phase laser process optimization
Author(s): Patricia Laurens; C. Dubouchet; Didier Kechemair; Frederic Coste; Lilian Sabatier; F. Daniere; Herve L'Enfant
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Paper Abstract

In order to control CO2 laser treatments, a precise knowledge of the CO2 radiation- surface coupling is required. For this purpose, numerical identifications of the absorption coefficient, either with temporal resolution in non stationary 1D configuration or with spatial resolution in a stationary 2D configuration, were achieved from thermal cycles measurements and simulations. Evolutions of the coupling during laser treatment were studied both in the case of coated steel hardening (graphite and manganese phosphate coatings) and in the case of solid state nitridation of titanium alloys. Moreover, the determination of the CO2-surface coupling for those thermodiffusional solid state laser processes had been used to correlate experimental treated depths to those obtained by a simple thermodiffusional model taking into account carbon or nitrogen diffusion under a calculated thermal cycle.

Paper Details

Date Published: 7 September 1994
PDF: 8 pages
Proc. SPIE 2207, Laser Materials Processing: Industrial and Microelectronics Applications, (7 September 1994); doi: 10.1117/12.184738
Show Author Affiliations
Patricia Laurens, Unite mixte ETCA/CNRS (France)
C. Dubouchet, PSA/ER (France)
Didier Kechemair, Unite mixte ETCA/CNRS (France)
Frederic Coste, EIA Laser (France)
Lilian Sabatier, Unite mixte ETCA/CNRS (France)
F. Daniere, CREA/SL (France)
Herve L'Enfant, Unite mixte ETCA/CNRS (France)

Published in SPIE Proceedings Vol. 2207:
Laser Materials Processing: Industrial and Microelectronics Applications
Eckhard Beyer; Maichi Cantello; Aldo V. La Rocca; Lucien Diego Laude; Flemming O. Olsen; Gerd Sepold, Editor(s)

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