Time resolved CO2-metal coupling determination for solid phase laser process optimization

Patricia Laurens; C. Dubouchet; Didier Kechemair; Frederic Coste; Lilian Sabatier; F. Daniere; Herve L'Enfant

doi:10.1117/12.184738

7 September 1994 Time-resolved CO₂ metal coupling determination for solid phase laser process optimization

Patricia Laurens, C. Dubouchet, Didier Kechemair, Frederic Coste, Lilian Sabatier, F. Daniere, Herve L'Enfant

Proceedings Volume 2207, Laser Materials Processing: Industrial and Microelectronics Applications; (1994) https://doi.org/10.1117/12.184738
Event: Europto High Power Lasers and Laser Applications V, 1994, Vienna, Austria

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.

Citation Download Citation

Patricia Laurens, C. Dubouchet, Didier Kechemair, Frederic Coste, Lilian Sabatier, F. Daniere, and Herve L'Enfant "Time-resolved CO₂ metal coupling determination for solid phase laser process optimization", Proc. SPIE 2207, Laser Materials Processing: Industrial and Microelectronics Applications, (7 September 1994); https://doi.org/10.1117/12.184738

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