Non-contact ultrasonic waveforms in metals using laser generation and interferometric detection

DOI	Resolve DOI: https://doi.org/10.1109/ULTSYM.1983.198249
Author	Search for: Hutchins, D. A.; Search for: Nadeau, F.¹
Affiliation	National Research Council Canada
Format	Text, Article
Conference	1983 Ultrasonics Symposium, Oct. 31-Nov. 2, 1983, Atlanta, Georgia
Abstract	A range of ultrasonic waveforms have been generated in an aluminum plate by a Q-switched Nd: YAG laser. Displacements on the far side of the plate were detected on-epicentre by an interferometer with a resolution of 0.2 A and a bandwidth of 40 MHz. At optical power densities below the ablation threshold, the thermoelastic waveform was observed without signal averaging. At increased generating power densities the waveform was seen to be modified. In all cases, good agreement was seen with predictions of wave propagation theory. Studies were also undertaken for generation at modified surfaces.
Publication date	1983-11-02
Publisher	IEEE
In	1983 Ultrasonics Symposium: 1175–1177.
Language	English
Peer reviewed	Yes
NRC number	CNRC 21374 NRC-IGM83-166-093
NPARC number	23004034
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Record identifier	12ff251a-27a6-4148-9593-bc867b21daed
Record created	2018-09-18
Record modified	2020-03-13