Research on technology of metal plate plastic forming by laser shot peening

Laser peening forming is a novel technology with high-power short-duration laser pulses irradiating plate.When the peak pressure of laser shock waves induced by laser goes beyond the dynamic yield strength of the material,the unrecovered plastic micro-deformation in laser peening zone in plate surface occurs and leads uneven residual stresses along the thickness of plate,and eventually result in plate to deform at on macroscopically.The deformation of plate is affected by several factors such as laser parameters,shot numbers,shot tracks,and mechanical properties of metal plate.Due to leaving beneficial residual compressive stress in component's surface,it extends workpiece fatigue lifetime.