Patent ID: 6570125
Filing Date: 2003-05-27
Classification: B23K,C21D,F01D

Abstract:
A method for laser shock peening first and second surfaces on opposite first and second sides respectively of an article, said method comprising:simultaneously firing first and second laser beams at first and second oblique angles with respect to the first and second surfaces so as to form overlapping adjacent laser spots on the surfaces, firing the first and second laser beams such that first and second centerlines of the first and second laser beams impinge the first and second surfaces at first and second laser beam centerpoints through which pass parallel first and second axes that are substantially normal to the first and second surfaces at the first and second laser beam centerpoints, respectfully, and such that the first and second axes are offset, and firing the laser beams with sufficient energy to form regions having compressive residual stresses imparted by the laser shock peening extending into the article from the surfaces.