Laser ultrasonic thickness measurements of very thick walls at high temperatures

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Proceedings titleQuantitative Nondestructive Evaluation
Series titleAIP Conference Proceedings; no. 820
ConferenceThe 32th Annual Review of Progress in Quantitative Nondestructive Evaluation, July 31 - August 05 2005, Brunswick, Maine, USA
Pages240247; # of pages: 8
AbstractLaser-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 °C.
Publication date
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute
Peer reviewedYes
NRC number53695
NPARC number15861572
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Record identifier35b7cc63-93db-4f95-8fd2-4a9392f0d73c
Record created2010-07-30
Record modified2016-05-09
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