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Proceedings Paper

Development of pulsed gas discharge lasers for shock hardening
Author(s): Gerd Hintz; R. Tkotz; C. Keusch; Matthias Negendanck; Jens Christiansen; D. H. H. Hoffmann
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Paper 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.

Paper Details

Date Published: 26 August 1996
PDF: 10 pages
Proc. SPIE 2788, High-Power Lasers: Gas and Solid State Lasers, (26 August 1996); doi: 10.1117/12.248601
Show Author Affiliations
Gerd Hintz, Bayerisches Laserzentrum (Germany)
R. Tkotz, Bayern Innovativ (Germany)
C. Keusch, Bayerisches Laserzentrum (Germany)
Matthias Negendanck, Bayerisches Laserzentrum (Germany)
Jens Christiansen, Bayerisches Laserzentrum (Germany)
D. H. H. Hoffmann, Univ. Erlangen-Nuernberg (Germany)

Published in SPIE Proceedings Vol. 2788:
High-Power Lasers: Gas and Solid State Lasers
Tommaso Letardi; Horst Weber, Editor(s)

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