Kai Wang, Duosheng Li, Yin Ye, Junming Luo, Sihai Long, Jiyuan Guan, Feitong Xie, Suhang Jiang, Mingdi Wang, Ning Wu. Study on nondestructive laser cleaning of aviation aluminum alloy surface coating[J]. Infrared and Laser Engineering, 2022, 51(12): 20210936
- Infrared and Laser Engineering
- Vol. 51, Issue 12, 20210936 (2022)
Fig. 1. (a) Surface topography drawing of oxide layer of the sample; (b) Surface topography drawing of coating of the sample; (c) Cross section
Fig. 2. (a) Test platform and (b) Schematic diagram of laser cleaning system
Fig. 3. (a) Schematic diagram of the first step laser cleaning path; (b) Schematic diagram of the second step laser cleaning path
Fig. 4. (a) Schematic diagram of spot overlap ratio; (b) Schematic diagram of path overlap ratio
Fig. 5. SEM of samples cleaned at different laser powers. (a) 30 W; (b) 35 W; (c) 40 W; (d) 45 W; (e) 50 W; (f) 60 W
Fig. 6. (a) The contents of Ti, Si, Mg and S in the sample after laser cleaning; (b) The contents of Al, O and C in the sample after laser cleaning
Fig. 7. Effect of laser on (a) oxide layer and (b) coating under the same process parameters; (c) Profile between two points AB in (b)
Fig. 8. Surface topography of the sample after laser cleaning. (a) 40 W; (b) 60 W; (c) 80 W; (d) 100 W
Fig. 9. Weight change of the same sample before and after each cleaning
Fig. 10. (a) SEM diagram and (b) EDS diagram of the sample after laser cleaning
Fig. 11. Mechanical properties of sample after laser cleaning and original sample. (a) Microhardness; (b) Stress-strain curves
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Table 1. Atomic fraction of the major elements in coating and oxide layer
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Table 2. Laser cleaning effect under different laser powers
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