Laser-ultrasonic characterization of the annealing process of low-carbon steel

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DOIResolve DOI: http://doi.org/10.1063/1.1570332
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TypeArticle
Proceedings titleReview of Progress in Quantitative Nondestructive Evaluation: Volume 22
Series titleAIP Conference Proceedings; no. 657
ConferenceReview of Progress in Quantitative Nondestructive Evaluation, July 14-19 2002, Bellingham, Washington USA
ISSN0094-243X
Pages16811688; # of pages: 8
Subjectultrasonic velocity; annealing; internal friction; ultrasonics; laser sensors
AbstractLaser-ultrasonic measurements are performed during the annealing of cold-worked low-carbon steel at temperatures between 590°C and 610°C. During annealing, the ultrasound velocity behaves in a peculiar way, first decreasing and then increasing to a final value. The recrystallized fraction evaluated by metallography indicates that recrystallization occurs during both the decrease and the increase in longitudinal velocity. Texture evaluated using laser ultrasonics suggests that the peculiar behavior of the velocity might be due to two different regimes of texture evolution. Internal friction, investigated through ultrasound absorption measurements, is also revealed to be very sensitive to the annealing process. This internal friction is attributed to magnetomechanical effects that are also known to decrease the ultrasonic longitudinal velocity and probably contribute to the observed peculiar behavior of the velocity. From this work, we conclude that, although there remains much work to do to explain our observations, both the longitudinal velocity and internal friction measurements are promising approaches for the development of an online sensor to characterize annealing using laser-ultrasonics.
Publication date
PublisherAmerican Institute of Physics
LanguageEnglish
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NPARC number21273115
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Record identifier946b588b-516e-4aea-bcc9-a3cff4363517
Record created2014-12-15
Record modified2016-05-09
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