Yi Tong, Taiwen Qiu, Junlan Yi, Junhua Feng, Ze Tian, Zhenglong Lei, Haoran Sun. Effect of Pulse Frequency on Laser Cleaning Mechanism of Paint Coating[J]. Laser & Optoelectronics Progress, 2021, 58(19): 1914009
- Laser & Optoelectronics Progress
- Vol. 58, Issue 19, 1914009 (2021)
Fig. 1. Morphology of oxidation film on the aluminum alloy substrate
Fig. 2. Macro appearances of the substrate cleaned by nanosecond pulse laser with different frequencies.
Fig. 3. Surface morphologies of the substrate observed at 500 times magnification. (a) 5 kHz; (b) 10 kHz; (c) 20 kHz
Fig. 4. Cleaned interface with different pulse frequencies. (a) 5 kHz; (b) 10 kHz; (c) 20 kHz
Fig. 5. Geometric model and mesh generation
Fig. 6. Power density-time distribution of pulse laser
Fig. 7. Schematic of thermal boundary conditions
Fig. 8. Schematic of boundary conditions of solid mechanics module
Fig. 9. Temperature fields and ablation morphologies at different frequencies (t=0.001 s)
Fig. 10. Laser cleaning depth and ablative amount at different frequencies. (a) 5 kHz; (b) 10 kHz; (c) 15 kHz; (d) 20 kHz; (e) 25 kHz; (f) change of paint ablative amount with frequency
Fig. 11. Location of domain probe
Fig. 12. Maximum stress versus frequency for the interface between coating and substrate
Fig. 13. Variation of maximum thermal stress with pulse energy density
Fig. 14. Stress of probe point at different frequencies
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Table 1. Chemical composition of 2024 aluminum alloy
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Table 2. Partial process parameters
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Table 3. Physical properties of materials
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Table 4. Partial pulse laser parameters
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