The effect of scanning pitch of nozzle for a cavitating jet during overlapping peening treatment

► Effect of the pitch of scanning the nozzle for a cavitating jet was verified for a uniform and effective treatment. ► Striped patterns due to non-uniform treatment were obtained at scanning pitches of 6, 8, 10 and 12 mm. ► The pitch of 4 mm was determined as the best pitch in consideration of the most efficient treatment.