Fig. 1. Surface morphology and parameters of polished aluminum alloy cylinder liner. (a) Metallograph; (b) roughness

Fig. 2. Laser microtexture processing system

Fig. 3. Characterization of geometry topography of micro-dimple. (a) Surface topography; (b) cross-sectional profile

Fig. 4. Influence of energy density on micro-dimple geometry topography. (a) Diameter and depth; (b) ablation volume

Fig. 5. Three dimensional topography of micro-dimple under different pulse numbers. (a) 1 pulse; (b) 5 pulses; (c) 10 pulses; (d) 20 pulses; (e) 30 pulses; (f) 50 pulses

Fig. 6. Effect of pulse number on size and volume of micro-dimples. (a) Diameter and depth; (b) ablation volume

Fig. 7. Histogram of hardness on edge of dimple at energy density of 18 J/cm² and 180 J/cm²

Fig. 8. Curves of E_P and D²

Fig. 9. Curve of φ_th and N

Fig. 10. Micro-textured surface topography with different area occupancies. (a) 5%; (b) 10%; (c) 20%

Fig. 11. Effect of micro-texture with different area occupancy rates on surface friction performance of cylinder liner. (a) Friction curves; (b) abrasion loss