Abstract :
Peening method using cavitation impact at
bubble collapse has been proposed. At the peening, cavitation
bubble was normally generated by injecting a highspeed
water jet into a water-filled chamber, i.e., a cavitating
jet in water. In the present paper, the peening using a
cavitating jet in air, which can generate the cavitation
bubble without a water-filled chamber was investigated. It
was revealed that the improvement of fatigue strength
peened by the cavitating jet in air was better than that of the
cavitating jet in water.
