Article
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Development of Laser Cavitation Peening Using a Normal-Oscillation Nd:YAG Laser
Version 1
: Received: 19 July 2023 / Approved: 19 July 2023 / Online: 19 July 2023 (09:55:44 CEST)
A peer-reviewed article of this Preprint also exists.
Soyama, H. Development of Laser Cavitation Peening Using a Normal-Oscillation Nd:YAG Laser. Coatings 2023, 13, 1395. Soyama, H. Development of Laser Cavitation Peening Using a Normal-Oscillation Nd:YAG Laser. Coatings 2023, 13, 1395.
Abstract
The impact induced by cavitation bubble collapse can be utilized for mechanical surface treatment to improve fatigue properties of metals including additive manufactured metallic materials. A peening method using cavitation impact induced by a pulsed laser is called “laser cavitation peening (LCP)”. Normally, a Q-switched Nd:YAG laser, whose pulse width is a few nanoseconds, is used for LCP, which improves the fatigue strength. The problem with LCP is that the processing time is too slow. If a laser pulse whose pulse width is a few hundred microseconds can be utilized for LCP, the repetition frequency can be increased drastically using other types of laser systems such as a fiber laser. In the present paper, in order to reveal the possibility of LCP using a pulsed laser width of a few hundred microseconds, the use of LCP with a normal-oscillation Nd:YAG laser (pulse width ≈ 200 us) was investigated. It is demonstrated that LCP with the normal-oscillation Nd:YAG laser produced curvature in an aluminum alloy plate.
Keywords
pulsed laser; pulse width; cavitation; mechanical surface treatment; peening
Subject
Engineering, Mechanical Engineering
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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