Ultrasonic Wave Generation by Lasers on Different Metal Surfaces

Journal Article · Wed Mar 21 00:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2717975· OSTI ID:21054960

Kruger, S E; Lord, M ^[1]

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1. Industrial Materials Institute, National Research Council of Canada, Boucherville, Quebec, J4B 6Y4 (Canada)

Ultrasonic wave generation by short pulsed laser is revisited in this paper with new experimental work. The generation laser pulse is fiber delivered and a virtually uniform intensity spot is obtained. Ultrasonic pulse strength versus laser pulse energy is obtained for various aluminum and steel surface conditions. To have a better reproducibility, the sample moves after each measurement in order to have a fresh surface for each laser shot. Results show a strong effect of the surface condition. Special attention is paid to the frequency dependence of the generated ultrasonic waves for different laser intensities. The problem of the optimum spot size for a given laser pulse energy is also discussed.

• OSTI ID: 21054960
• Journal Information: AIP Conference Proceedings, Vol. 894, Issue 1; Conference: Conference on review of progress in quantitative nondestructive evaluation, Portland, OR (United States), 30 Jul - 4 Aug 2006; Other Information: DOI: 10.1063/1.2717975; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALUMINIUM
FIBERS
FREQUENCY DEPENDENCE
LASER RADIATION
PULSES
STEELS
SURFACES
ULTRASONIC TESTING
ULTRASONIC WAVES