Study on the mechanism of multiple physical processes by laser action on coating on aluminium alloy surface

• Published in: Optical and quantum electronics 2024-02, Vol.56 (2), Article 179
• Main Authors: Zhao, ZeJia, Liu, Xin, Pan, WenFeng, Liang, Fei, Li, Yang, Tian, Ye, Liu, LiSa, Song, Feng
• Format: Article
• Language: English
• Subjects: Aluminum base alloys; Characterization and Evaluation of Materials; Coating; Computer Communication Networks; Damage; Electrical Engineering; Lasers; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Pulse cleaning; Two dimensional models; Yield point
• ISSN: 0306-8919; 1572-817X
• DOI: 10.1007/s11082-023-05733-5

With the development of laser technology, laser cleaning technology has been widely applied to remove surface coating. Many studies on laser cleaning of surface coating in the theoretical model or experimental analysis mainly focus on single-pulse or two-pulse cleaning. In the actual application, the results obtained are limited. In this study, the pulse number of Z-shaped laser motion trails is analyzed considering the X and Z directions. A two-dimensional model is established to explore multiple physical processes of multipulse laser cleaning of coating. Heat accumulation effects are confirmed by the model. The effect of different laser energy densities on the removal of surface coating also is discussed. The cleaning threshold and damage threshold are obtained by the model. The combination with experiments acquires the optimal laser cleaning parameter. The laser energy density of 1.66 J/cm 2 can achieve complete surface coating removal. When laser energy density is 1.78 J/cm 2 , the Al alloy surface appears some damages. The result also is confirmed by SEM and AFM. This work lays the groundwork for theoretical research and practical guidance in laser cleaning of surface coating on Al alloy surfaces.