Abstract
Pulse laser produces two kinds of shock wave related to laser abrasion and bubble collapse. In the case of laser peening, the shock wave induced by laser abrasion in water was normally used. However, the shock wave induced bubble collapse can be also used for the mechanical surface treatment. In the present paper, it was revealed that the noise corresponding to the shock wave by bubble collapse produced by pulse laser was stronger than that of laser abrasion and we demonstrated that the pulse laser at the present condition can be applied for the mechanical surface treatment.
