PEEN FORMING OF DURALUMIN PLATE BY USING A CAVITATING JET IN AIR

Cavitation impacts at bubble collapse normally cause severe damage in hydraulic machineries. However, cavitation impact can be utilized to improve fatigue strength the same way as shot peening. In the present paper, the possibility of cavitation impact for peen forming was investigated. Peen forming is used to make curvature of main wing of airplanes. Cavitation impacts were produced by a cavitating jet in air, which was injected low-speed water jet and high-speed water jet into air by using concentric nozzle. It was concluded that convex curve of duralumin plate was produced by the cavitating jet in air.