It is difficult to detect the elastic deformation on the metal surface induced by nanosecond laser pulse. Optical fiber sensor system is suitable for detecting the elastic deformation, which has many advantages such as the high sensitivity, fast speed (GHz), non-contact, non-loss and point-measurement. We set up the measuring system to analyze the deformation mechanism firstly. Then, the elastic deformation on the metal surface was investigated. The relation between the shock-wave and elastic deformation was analyzed. The result of the present work implicated that as the nanosecond laser pulse radiated to the metal surface, elastic deformation had a delay time which was around 320ns. And the deformation presented the damped oscillation law. The data of laser-induced plasma shock wave were fitted and the fitting degree was 97.696%.The variation law of laser-induced plasma shock-wave was obtained. These results helped to make the laser removal applied to the manufacturing technique better.

Date Published: 19 October 2016
PDF: 8 pages
Proc. SPIE 10153, Advanced Laser Manufacturing Technology, 1015310 (19 October 2016); doi: 10.1117/12.2246986

Published in SPIE Proceedings Vol. 10153:
Advanced Laser Manufacturing Technology
Bingheng Lu; Huaming Wang, Editor(s)