Journal
OPTICS AND LASERS IN ENGINEERING
Volume 48, Issue 6, Pages 690-697Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlaseng.2010.01.008
Keywords
Fiber laser; Micro-notch; Fatigue life
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Funding
- Navair
- NSF/UCRC Laser Centre
- Directorate For Engineering
- Div Of Industrial Innovation & Partnersh [823780] Funding Source: National Science Foundation
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Evaluation of fatigue life for engineering components used in structurally demanding applications is very important. Micro-notches need to be fabricated on test specimens to replicate surface defects for experimental determination of fatigue life studies. A study for generating micro-notches on engineering materials like stainless steel and aluminum alloys using a nano-second pulsed fiber laser has been carried out and results are reported in this paper. The effect of different process parameters on the notch size has been studied. The mechanism of material removal in forming the notches has been studied as a function of laser fluence. The development of the notch by the interaction of laser pulses has also been studied by monitoring the reflected light from the interaction region. (C) 2010 Elsevier Ltd. All rights reserved.
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