Mechanical effect of laser-induced cavitation bubble of 2A02 alloy

Cavitation Shotless Peening is a process that can be used to strengthen a material. The mechanical effects are investigated in this paper. Sclerometer and X-ray diffraction (XRD) were used to study the mechanical property of the samples treated by laser-induced cavitation bubble. The results indicate that the change of micro-hardness in the depth and the horizontal directions of samples treated by Cavitation Shotless Peening are more obvious with the increase of laser energy. The depth of the strengthened layer increases with an increase in laser energy. And the best position of intensified effect is that the defocusing amount is equal to 1 mm. The researches provide a new high efficient method to strengthen the material.