Journal
OPTIK
Volume 243, Issue -, Pages -Publisher
ELSEVIER GMBH
DOI: 10.1016/j.ijleo.2021.167426
Keywords
Laser ultrasonic; Guided waves; Cu; Al composites; Delamination; Nondestructive testing
Categories
Funding
- National Natural Science Foundation of China [51575040]
- Natural Science Foundation of Beijing Municipality [3182008]
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A laser ultrasonic method based on guided waves was proposed to characterize delamination defects in Cu/Al composites. The results showed that the amplitudes of guided waves can effectively characterize the delamination defects, and the C-scan imaging can accurately show the location and size of the defects.
A laser ultrasonic method based on guided waves was proposed to characterize delamination defects in Cu/Al composites. Simulation analysis was used to analyse to the propagation characteristics of laser ultrasound. The delamination defects made the mode of laser ultrasound change from surface wave to guided wave. The influences of delamination size on guided waves were analyzed to investigate the interaction between laser ultrasound and delamination. The amplitudes of the guided waves were used to characterize the delamination defect. A laser ultrasound experimental platform was built. The experimental results and simulation analysis results have similar trends and characteristics. The C-scan imaging results can show the location and size of the delamination defects. Therefore, the detection method based on laser ultrasonic technology is effective for delamination detection in Cu/Al composites, which can provide realtime monitoring data for the rolling process.
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