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A research is conducted to analyze the effect of shot peening on distribution of hardness, surface roughness, and wettability of AISI 316 L. The shot peening process was performed on the surface of a 316L stainless steel sample with a shooting duration of 2, 4, 15, and 30 minutes, using a 0.4 mm diameter steel ball with a hardness of 40-50 HRC, the pressure of compressor held constant at 8 bar with nozzle diameter 5 mm, and the distance between the nozzle and the surface sample is 6 cm and 12 cm for each shooting duration. The results show that the shot peening can change the surface roughness. The closer the distance and the longer the duration of shot peening will reduce the surface roughness. Surface hardness increase with increasing of shooting duration and hardness distribution rate declines as the farther the distance from the surface of the shot peening.

Distribution of Hardness, Surface Roughness and Wettability of AISI 316L Induced by Shot Peening with Different Duration and Shooting Distance