Mechanical analysis of paint film stripping from aluminum plate surface by means of nanosecond laser

YANG Jie; HAN Jing-hua; DUAN Tao; SUN Nian-chun; GUO Chao; FENG Guo-ying; LIU Quan-xi

doi:10.7510/jgjs.issn.1001-3806.2013.06.003

In order to study the laser stripping mechanism, paint film stripping from aluminum plate surface experiments were demonstrated using the radiation of 1064nm nanosecond pulse laser. According to thermal conductivity theory, the temperature distribution of the film and the aluminum surface under laser irradiation were simulated. The separating force generated by the aluminum plate at the interface due to thermal expansion was calculated. The formation of the plasma shock wave on the removal of the paint film was also analyzed. The result shows that the effect of force is the key factor for nanosecond laser removal of the film, separation force due to thermal expansion provides necessary condition for the removal of the film, and the constraint of the film on the laser plasma eventually leads to its own cracking and spalling. A conclusion was made that thermodynamic theory can be used for analysis of removal mechanism of metal surface coating with nanosecond laser.

Mechanical analysis of paint film stripping from aluminum plate surface by means of nanosecond laser

Corresponding author: SUN Nian-chun, 8178137@163.com;

1. School of Electronics and Information Engineering, Sichuan University, Chengdu 610064, China;

2. Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China;

3. Southwest Institute of Technical Physics, Chengdu 610041, China

Received Date: 2013-03-08

Accepted Date: 2013-04-22

Available Online: 2013-11-25

Abstract: In order to study the laser stripping mechanism, paint film stripping from aluminum plate surface experiments were demonstrated using the radiation of 1064nm nanosecond pulse laser. According to thermal conductivity theory, the temperature distribution of the film and the aluminum surface under laser irradiation were simulated. The separating force generated by the aluminum plate at the interface due to thermal expansion was calculated. The formation of the plasma shock wave on the removal of the paint film was also analyzed. The result shows that the effect of force is the key factor for nanosecond laser removal of the film, separation force due to thermal expansion provides necessary condition for the removal of the film, and the constraint of the film on the laser plasma eventually leads to its own cracking and spalling. A conclusion was made that thermodynamic theory can be used for analysis of removal mechanism of metal surface coating with nanosecond laser.

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Reference (18)

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Mechanical analysis of paint film stripping from aluminum plate surface by means of nanosecond laser

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