Monitoring austenite decomposition by ultrasonic velocity

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Journal titleMaterials science and engineering
Pages238243; # of pages: 6
SubjectLaser-ultrasonics; Steel phases; Austenite; Dilatometry
AbstractThe ultrasonic longitudinal velocity measured by the laser-ultrasonic technique is compared to dilatometry for the monitoring of austenite decomposition of low alloy steels. It is demonstrated that the technique could be an interesting alternative to dilatometry. The temperature dependence of the ultrasonic velocity and the various phases in steels is determined and used to calculate the decomposed austenite by a simple law of mixtures approximation. As a non-destructive and non-contact technique, laser-ultrasonics can be applied to monitor austenite transformation of real products in an industrial production line, which would be much more difficult with dilatometry.
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AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute
Peer reviewedYes
NRC number48882
NPARC number15884105
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Record identifier986ec68d-0ff2-4736-b251-099317ad5d0d
Record created2010-07-30
Record modified2016-05-09
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