Fig. 1. Diagram of experimental device

Fig. 2. Aluminum plate model

Fig. 3. Surface morphology of aluminum alloy at different laser power density of 834 W/cm² under 0.6 Ma airflow

Fig. 4. Surface temperature distribution of aluminum alloy by thermal imager at different times and laser power density of 834 W/cm² under 0.6 Ma airflow

Fig. 5. Temperature rise process at the center point of aluminum alloy under the action of airflow at 0.6 Ma and laser power density of 834 W/cm²

Fig. 6. Temperature rise history of aluminum alloy center under laser irradiation with different power densities under 0.6 Ma airflow

Fig. 7. Ablation morphology of 7075 aluminum alloy under 0.6 Ma airflow

Fig. 8. Perforation time and pore size of aluminum alloy irradiated by different laser power densities under 0.6 Ma airflow

Fig. 9. Effect of different flow rates on perforation time under the action of 691 W/cm² laser power density

Fig. 10. Temperature rise curves at first perforation point (a) and center point (b) at 0 Ma and 0.1 Ma at laser power density 691 W/cm²

Fig. 11. 691 W/cm² laser irradiation ablation morphology of 7075 aluminum alloy

Fig. 12. Central temperature rise curves at 0.1 Ma, 0.2 Ma and 0.3 Ma at 691 W/cm² laser power density

Fig. 13. Laser irradiation of 7075 aluminum alloy at 691 W/cm² laser power density. (a) Ablation morphology at 0.1 Ma; (b) Ablation morphology at 0.2 Ma; (c) Ablation morphology at 0.3 Ma

Fig. 14. Temperature rise curves at the center of 0.3 Ma, 0.4 Ma and 0.5 Ma at 691 W/cm² laser power density

Fig. 15. Laser irradiation of 7075 aluminum alloy at 691 W/cm² laser power density. (a) 0.3 Ma ablation morphology; (b) 0.4Ma ablation morphology; (c) 0.5 Ma ablation morphology

Fig. 16. Central temperature rise curves at 0.5 Ma, 0.6 Ma and 0.7 Ma at 691 W/cm² laser power density

Fig. 17. Laser irradiation of 7075 aluminum alloy at 691 W/cm² laser power density. (a) Ablation morphology at 0.5 Ma; (b) Ablation morphology at 0.6 Ma; (c) Ablation morphology at 0.7 Ma