Three dimensional evaluation of aluminum plates with wall-thinning by full-field pulse-echo laser ultrasound

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We propose a full-field pulse-echo laser ultrasonic wave propagation imager (FF-PE-UPI) for the evaluation of structural defects. The FF-PE-UPI consists of a Q-switched laser for the generation of thermoelastic waves, a laser Doppler vibrometer (LDV) for sensing, and a two-axis translation stage for raster scanning of the combined generation and sensing laser beams. A-scan, B-scan, and C-scan data representations are used for the evaluation of structural defects. Three specimens were tested: a 4-mm aluminum plate with an area of 50% thickness reduction, a 6-mm aluminum plate with an area of 25% thickness reduction, and an 8-mm aluminum plate with engraved letters. The damages on the tested specimens were successfully visualized.
Publisher
ELSEVIER SCI LTD
Issue Date
2017-12
Language
English
Article Type
Article
Citation

OPTICS AND LASERS IN ENGINEERING, v.99, pp.58 - 65

ISSN
0143-8166
DOI
10.1016/j.optlaseng.2016.08.010
URI
http://hdl.handle.net/10203/226900
Appears in Collection
AE-Journal Papers(저널논문)
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