A method of laser shock peening a gas turbine engine object continuously firing a stationary laser beam, which repeatably pulses between relatively constant periods, on a portion of the object with a low power laser beam, on the order of 3-10 joules, to vaporize material on the surface of a portion of...http://www.google.de/patents/US5932120?utm_source=gb-gplus-sharePatent US5932120 - Laser shock peening using low energy laser
