Author(s)

H. Soyama, M. Asahara & M. Saka

Abstract

Cavitation can be use for hybrid surface treatment, that is improvement of the fatigue strength and the corrosion resistance at once. In the present paper, hybrid effects induced by the cavitation were demonstrated experimentally. Cavitation, which normally produces fatal damage on hydraulic machinery, can be used to introduction of compressive residual stress in metal surface as the same as shot peening. The cavitation bubble collapse also produces the high temperature spot, which can introduce chemical effect on metal surface. As the cavitation intensity and the cavitating region of high speed submerged water jet can be controlled by the hydraulic parameter such as upstream pressure and the cavitation number, the cav

Keywords