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Article

Delamination Detection in Bimetallic Composite Using Laser Ultrasonic Bulk Waves

1
School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
2
College of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2021, 11(2), 636; https://doi.org/10.3390/app11020636
Received: 10 December 2020 / Revised: 5 January 2021 / Accepted: 7 January 2021 / Published: 11 January 2021
(This article belongs to the Section Optics and Lasers)
In this study, a method based on laser ultrasonic bulk waves is used to detect delamination in a bimetallic composite. For this purpose, several artificial delamination defects were created in a copper-aluminum sample using wire-electrode cutting. The research includes numerical simulation and experimental analysis. The propagation process of laser ultrasonic in Cu/Al bimetallic compo-site, the interaction between bulk waves and composite interface, and the effect of delamination defects on the ultrasound field were studied by numerical simulation. Suitable parameters and features were determined by numerical simulation, which provided a basis for the parameter se-lection of experimental research. The reflected shear waves from the composite interface can act as a sensitive feature to detect the delamination in Cu/Al bimetallic composites. The distance between the detection point and the excitation point was set to 2 mm to take into account the detection resolution and efficiency. The experimental results were in good agreement with the simulation results, and the C-scan image can intuitively show the location and size of delamination defects. The detection method based on laser ultrasonic bulk waves can effectively detect the delamination in Cu/Al bimetallic composite, which is suitable for the on-line detection of the rolling composite process. View Full-Text
Keywords: bimetallic composite; delamination; nondestructive testing; laser ultrasonic; bulk wave bimetallic composite; delamination; nondestructive testing; laser ultrasonic; bulk wave
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MDPI and ACS Style

Ji, B.; Zhang, Q.; Cao, J.; Zhang, B.; Zhang, L. Delamination Detection in Bimetallic Composite Using Laser Ultrasonic Bulk Waves. Appl. Sci. 2021, 11, 636. https://doi.org/10.3390/app11020636

AMA Style

Ji B, Zhang Q, Cao J, Zhang B, Zhang L. Delamination Detection in Bimetallic Composite Using Laser Ultrasonic Bulk Waves. Applied Sciences. 2021; 11(2):636. https://doi.org/10.3390/app11020636

Chicago/Turabian Style

Ji, Baoping, Qingdong Zhang, Jianshu Cao, Boyang Zhang, and Liyuan Zhang. 2021. "Delamination Detection in Bimetallic Composite Using Laser Ultrasonic Bulk Waves" Applied Sciences 11, no. 2: 636. https://doi.org/10.3390/app11020636

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