Influence of steel heat treatment on ultrasonic absorption measured by laser ultrasonics

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Proceedings titleMaterials Science and Engineering A
Conference13th International Conference on Internal Friction and Ultrasonic Attenuation in Solids, Bilbao, Spain, July 8-12, 2002, Bilbao, Spain
Pages401406; # of pages: 6
SubjectInternal friction; Ultrasound absorption; Reverberation technique; Laser ultrasonics
AbstractLaser ultrasonics is combined with the reverberation technique to measure ultrasound absorption during thermal cycles applied to medium-carbon steel samples. During heating to the austenitic phase, a small Snoek peak is observed around 360 °C at 10 MHz along with a signature of the ferromagnetic to paramagnetic transition near 768 °C. Upon cooling, the behavior of the internal friction is much different from that of heating: reduced high-temperature absorption, delayed phase transition, smaller magnetoelastic contribution and stronger Snoek peak are observed. The austenitizing temperature is found to have primary importance on the internal friction behavior during cooling. These measurements show that ultrasound absorption measurements using laser ultrasonics could serve as a basis for a technique to characterize the microstructure evolution of steel in various temperature ranges.
Publication date
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NRC number45288
NPARC number18476841
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Record identifier9d4d3d7b-74f3-4ed1-ae05-9f7257150418
Record created2011-10-11
Record modified2016-05-09
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