Non-contact Detection of Delamination in Cu/Al Laminated Plate with Laser Ultrasonic

Abstract

Abstract In this paper, a non-contact non-destructive inspection method based on laser ultrasonic was proposed for the detection of interface delamination in Cu/Al laminated plates. The finite element model of laser ultrasonic Cu/Al laminated plates were built to analyze the propagation of laser ultrasound in Cu/Al laminated plates and the effects of interface delamination defects on the ultrasonic field distribution. The simulation results were verified by the laser ultrasonic detection system. The C-scan detection results realizes the visual detection of delamination defects, and provides precise information about the composite quality of the Cu/Al laminated plates. Experimental results show that laser ultrasonic technology has great potential for online non-contact detection of Cu/Al laminated plates.