By: Che Zhi-gang
The technique of laser shock process (LSP) is an advanced surface treatment, which import high pressure shock wave induced by laser beam into target materials to improve their performance. The fatigue life of the materials is prolonged by times through changing the stress distribution. The hardness and strength are increased remarkably and corrosion resistance is improved after LSP. Compared with other treatment techniques, LSP have many advantages, such as high pressure, high energy, high strain rate, noncontact, no heat-affected zone, better controllability and roughness and remarkable processing effect.