Fig. 1. Schematic of LSP

Fig. 2. Laser irradiation experiment of 5052 aluminum alloy

Fig. 3. Macroscopic and microscopic surface morphology of 5052 aluminum alloy before and after LSP. (a) Macroscopic morphology before LSP; (b) macroscopic morphology after LSP; (c) microscopic morphology before LSP; (d) microscopic morphology after LSP

Fig. 4. Damage effect of different laser energy density on the material surface^[15].(a)Laser cleaning;(b)laser ablation

Fig. 5. Curve of number of 0.3--0.5 μm particles with different laser energy density before and after LSP

Fig. 6. Laser ablation and laser cleaning. (a) Laser ablation; (b) enlarged laser ablation; (c) laser cleaning

Fig. 7. Curve of number of 0.3--0.5 μm particles with different laser energy density

Fig. 8. Micro surface morphology of 5052 aluminum alloy after LSP at three laser power density. (a) 0.75 GW/cm²; (b) 1.12 GW/cm²; (c) 1.88 GW/cm²