Mechanical Surface Treatment of Duralumin Plate by Bubble Induced by Pulse Laser

9th International Symposium on Cavitation

Soyama, H.^1 ; Sasaki, H.^2 ; Endo, S.^2 ; Iga, Y.^3

Department of Nanomechanics, Tohoku University, Sendai, Japan^1

Graduate School of Engineering, Tohoku University, Sendai, Japan^2

Institute of Fluid Science, Tohoku University, Sendai, Japan^3

关键词: Bubble collapse;    Laser peening;    Mechanical surface treatment;    Pulse laser;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012108/pdf
DOI  :  10.1088/1742-6596/656/1/012108

来源: IOP

【 摘 要 】

Surface of duralumin plate can be treated by not only laser abrasion but also bubble induced by pulse laser. The pulse laser produced two kinds of shock waves related to laser abrasion and bubble collapse. In the case of laser peening, the shock wave induced by abrasion was normally used. In the present paper, the behaviour of bubble was observed and noise was detected by the hydrophone. It was revealed that the impact induced by the bubble collapse produced by the pulse laser was stronger than that of the laser abrasion. A numerical simulation was also carried out to investigate phenomenon of bubble collapse.