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Open AccessArticle

Investigation on the Surface Properties of 5A12 Aluminum Alloy after Nd: YAG Laser Cleaning

1
School of Mechanical Engineering, University of Jinan, Jinan 250022, China
2
Laser institute, Qilu university of Technology (Shandong Academy of Sciences), Jinan 250014, China
*
Author to whom correspondence should be addressed.
Coatings 2019, 9(9), 578; https://doi.org/10.3390/coatings9090578
Received: 5 August 2019 / Revised: 3 September 2019 / Accepted: 9 September 2019 / Published: 12 September 2019
The surface of the aluminum alloy is prone to oxidation, which in turn affects the quality of the weld. The 5A12 aluminum alloy was cleaned by acousto-optic Q-switched diode-pumped Nd:YAG laser and the effects of different laser powers and different cleaning speeds on the surface roughness, microstructure, element content, microhardness, residual stress and corrosion resistance of aluminum alloy were investigated. The results show that when the power is 98W and the cleaning speed is 4.1 mm/s, the effect of Nd: YAG laser on the removal of oxide film on 5A12 aluminum alloy surface is the most effective. After laser cleaning, the smoothness and strength of aluminum alloy surface can be effectively improved. However, as a major element in 5A12 aluminum alloy, the content of magnesium decreased. At the same time, the residual tensile stress was generated on the surface of the aluminum alloy after cleaning, and the corrosion resistance slightly decreased. View Full-Text
Keywords: laser cleaning; 5A12 aluminum alloy; surface properties laser cleaning; 5A12 aluminum alloy; surface properties
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Zhu, G.; Wang, S.; Cheng, W.; Wang, G.; Liu, W.; Ren, Y. Investigation on the Surface Properties of 5A12 Aluminum Alloy after Nd: YAG Laser Cleaning. Coatings 2019, 9, 578.

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