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Anomalous ultrasonic attenuation in ferritic steels at elevated temperatures

Hutchinson, Bevis (author)
RISE,KIMAB
Lundin, Peter (author)
RISE,KIMAB
Lindh-Ulmgren, Eva (author)
RISE,KIMAB
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Lévesque, D. (author)
National Research Council Canada, Canada
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 (creator_code:org_t)
Elsevier B.V. 2016
2016
English.
In: Ultrasonics. - : Elsevier B.V.. - 0041-624X .- 1874-9968. ; 69, s. 268-272
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • 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. 

Keyword

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

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ref (subject category)
art (subject category)

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Lundin, Peter
Lindh-Ulmgren, E ...
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