Development of pulsed gas discharge lasers for shock hardening

Gerd Hintz; R. Tkotz; C. Keusch; Matthias Negendanck; Jens Christiansen; D. H. H. Hoffmann

doi:10.1117/12.248601

26 August 1996 Development of pulsed gas discharge lasers for shock hardening

Gerd Hintz, R. Tkotz, C. Keusch, Matthias Negendanck, Jens Christiansen, D. H. H. Hoffmann

Proceedings Volume 2788, High-Power Lasers: Gas and Solid State Lasers; (1996) https://doi.org/10.1117/12.248601
Event: Lasers, Optics, and Vision for Productivity in Manufacturing I, 1996, Besancon, France

Abstract

Shock hardening of metals (e.g. Ti, stainless steel) by pulsed lasers offers the possibility of large hardening depth (several millimeters) without serious damage to the surface of the workpiece. Previous investigations for shock hardening have mainly been performed with high power solid state lasers. The adaptation of commercial, high power gas discharge lasers to the shock hardening process could make this process relevant for industrial applications, as high repetition rates may be used. Two different laser systems have been investigated: a TEA carbon-dioxide laser and a XeCl laser. Both systems have pulse energies of some joule, a pulse length of several ten nanoseconds, and pulse repetition rates of up to 10 Hertz. The divergence of the beam was minimized to improve focusing properties. Systematic measurements of the laser induced pressure by means of piezo probes have been performed. An enhancement of the hardness of illuminated Ti(RT15) targets has been found and is reported.

Citation Download Citation

Gerd Hintz, R. Tkotz, C. Keusch, Matthias Negendanck, Jens Christiansen, and D. H. H. Hoffmann "Development of pulsed gas discharge lasers for shock hardening", Proc. SPIE 2788, High-Power Lasers: Gas and Solid State Lasers, (26 August 1996); https://doi.org/10.1117/12.248601

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