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Abstract
Laser shock processing (LSP) is a new technology for surface strengthening holes. In this procedure, the choice of laser parameters is essential. The present paper investigates a method for optimising the laser parameters in laser shock processing of holes. Based upon this method, a series of laser shocking experiments were performed using a Q switched neodymium glass laser. The fatigue test results show that the fatigue life of a hole can be greatly increased after LSP. The average fatigue life of a laser shocked hole is 2·2 times longer than that without laser treatment.