Laser ultrasonic measurements of scattered waves in steel

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DOIResolve DOI: http://doi.org/10.1063/1.1373904
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TypeArticle
Proceedings titleReview of Progress in Quantitative Nondestructive Evaluation: 20B
Series titleAIP Conference Proceedings; no. 557
ConferenceReview of Progress in Quantitative Nondestructive Evaluation, July 16-20 2000, Ames, Iowa USA
ISSN0094-243X
Pages12981305; # of pages: 8
Subjectbackscattering; multiple scattering; laser ultrasonics; granular modeling; ultrasonic scattering
AbstractA laser ultrasonic system has been used to measure backscattered waves with the intention of evaluating microstructures of steels. The frequency spectrum of the backscattered signal from samples with different grain sizes is evaluated and compared with a simple model that accounts for single scattering and a first order correction to multiple scattering. This model predicts a maximum in the spectrum of the backscattered signal at the frequency near the transition between the single and multiple scattering. Accordingly, the experimental results show that for larger grain sizes, the scattered signal has a lower frequency content. A good quantitative correlation between the grain size and a spectrum parameter is presented.
Publication date
PublisherAmerican Institute of Physics
LanguageEnglish
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NPARC number21273123
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Record identifier213b2c0f-6191-49fe-a458-76cde8d90b70
Record created2014-12-16
Record modified2016-05-09
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