Laser shock processing of titanium alloy

The characteristic and application of laser shock processing was introduced in this paper, then the surface profile and residual stress and fatigue properties of laser shock processed titanium alloy were studied. The results show that laser shock processing has obvious effects on titanium alloy. There was shocked zone on the surface of the metal after laser shock processing, which with the same size as laser spot and depression of 10∼20μm, the max. residual stress is about − 600MPa,which correspond to the result with intense shot peening, but the intensity of plastic deformation was much more than that of shot peening. Suitable laser parameters and overlap rate can gain smooth and even surface, there were obvious marks, little deformation and no cracks on the surface of dual beam laser shock processed titanium turbine blade.