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Proceedings Paper

High-speed micro-scale laser shock peening using a fiber laser (Conference Presentation)
Author(s): Chenfei Zhang; Leimin Deng; Shiding Sun; Yongfeng Lu
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Paper Abstract

Laser shock peening using low-energy nanosecond (ns) fiber lasers was investigated in this study to realize high-speed micro-scale laser shock peening on selected positions without causing surface damage. Due to the employment of a fiber laser with high-frequency and prominent environmental adaptability, the laser peening system is able to work with a much higher speed compared to traditional peening systems using Nd:YAG lasers and is promising for in-situ applications in harsh environments. Detailed surface morphology investigations both on sacrificial coatings and Al alloy surfaces after the fiber laser peening revealed the effects of focal position, pulse duration, peak power density, and impact times. Micro-dent arrays were also obtained with different spot-to-spot distances. Obvious micro-hardness improvement was observed inside the laser-peening-induced microdents after the fiber laser shock peening.

Paper Details

Date Published: 21 April 2017
PDF: 1 pages
Proc. SPIE 10092, Laser-based Micro- and Nanoprocessing XI, 1009217 (21 April 2017); doi: 10.1117/12.2253754
Show Author Affiliations
Chenfei Zhang, Univ. of Nebraska-Lincoln (United States)
Leimin Deng, Univ. of Nebraska Lincoln (United States)
Shiding Sun, Univ. of Nebraska Lincoln (United States)
Yongfeng Lu, Univ. of Nebraska-Lincoln (United States)

Published in SPIE Proceedings Vol. 10092:
Laser-based Micro- and Nanoprocessing XI
Udo Klotzbach; Kunihiko Washio; Rainer Kling, Editor(s)

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