Anomalous ultrasonic attenuation in ferritic steels at elevated temperatures
2016 (English)In: Ultrasonics, ISSN 0041-624X, E-ISSN 1874-9968, Vol. 69, p. 268-272Article in journal (Refereed) Published
Abstract [en]
An unexpected peak in attenuation has been observed at ∼800 °C when heating low carbon steels in a laser-ultrasonic instrument. An explanation is given in terms of enhanced crystalline anisotropy with increasing temperature in the bcc ferrite range combined with subsequent transformation to austenite at still higher temperatures. An analysis based on theoretical models of attenuation in the Rayleigh regime is in good agreement with the experimental observations.
Place, publisher, year, edition, pages
Elsevier B.V. , 2016. Vol. 69, p. 268-272
Keywords [en]
Anisotropy, Attenuation, Laser-ultrasonics, Phase transformation, Steel, Carbon, Ferrite, Ferritic steel, Phase transitions, Crystalline anisotropy, Elevated temperature, Increasing temperatures, Laser ultra-sonics, Rayleigh regime, Ultrasonic attenuation, Low carbon steel
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-41173DOI: 10.1016/j.ultras.2016.03.005Scopus ID: 2-s2.0-84979462224OAI: oai:DiVA.org:ri-41173DiVA, id: diva2:1377371
Note
Funding details: RFSR-CT-2010-00010; Funding text 1: The authors thank Martin Engman who made valuable contributions with processing the data from laser-ultrasonic measurements and also SSAB for their support throughout the project. The work was funded within RFCS project RFSR-CT-2010-00010.
2019-12-112019-12-112020-12-01Bibliographically approved