Laser Ultrasonic Thickness Measurements of Very Thick Walls at High Temperatures

Journal Article · Mon Mar 06 00:00:00 EST 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2184535· OSTI ID:20798250

Kruger, S E; Lord, M; Monchalin, J -P ^[1]

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1. IMI - National Research Council of Canada, 75 de Mortagne Blvd., Boucherville, Quebec, J4B 6Y4 (Canada)

Laser-ultrasonics presents many advantages compared to conventional ultrasonics, but is, generally, considered as less sensitive. As a consequence, laser-ultrasonics should not be adequate for ultrasonic measurements in coarse microstructure materials or measurements of large thicknesses. However, since the generated waves extend to very low frequencies, measurements in such conditions can be successfully performed if a photorefractive interferometer sensitive also to these low frequencies and properly balanced is used for detection. This is demonstrated by measurements of thicknesses up to 100 mm (4'') for various steel grades and at temperatures up to 1250 deg. C.

• OSTI ID: 20798250
• Journal Information: AIP Conference Proceedings, Vol. 820, Issue 1; Conference: Conference on review of progress in quantitative nondestructive evaluation, Brunswick, ME (United States), 31 Jul - 5 Aug 2005; Other Information: DOI: 10.1063/1.2184535; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FREQUENCY MEASUREMENT
INTERFEROMETERS
LASER RADIATION
MICROSTRUCTURE
STEELS
THICKNESS
ULTRASONIC TESTING
ULTRASONIC WAVES