Patent ID: 6558485
Filing Date: 2003-05-06
Classification: C21D,C23C,F01D

Abstract:
A method of laser shock peening a metallic workpiece, said method comprising the following steps:forming a coated surface by coating a laser shock peening surface on the workpiece with an explosive coating containing at least one explosive ingredient, continuously firing a laser beam, which repeatably pulses between relatively constant periods, on the coated surface of the workpiece while providing continuous movement between the laser beam and the metallic workpiece, and firing the laser beam with sufficient power to vaporize the coating and to explode at least some of the explosive ingredient with the pulses and forming laser beam spots on the coating and forming a region in the workpiece having deep compressive residual stresses imparted by the laser beam pulsing such that the region extends into the workpiece from the laser shock peening surface.