Correlation between Ultrasonic Attenuation and Fracture Toughness of Steels

  • G. Canella
  • M. Taddei


An ultrasonic index has been found for direct NDT estimation of the fracture toughness of three different steels; one forged bainitic and two rolled: ferritic-pearlitic and acicular ferritic. Direct correlations have been found between ultrasonic attenuation and Critical Stress Intensity Factor in plain strain (KIC), Ductile Fracture Appearance Transition Temperature of Charpy-V curve (FATT) and Shelf Energy of the Charpy-V curve itself (KV).

A direct correlation has also been found between fracture toughness indices and grain size. To obtain these results a new method has been developed for measuring ultrasonic attenuation at room temperature on thin specimens even at high absorption.


Fracture Toughness Stress Intensity Factor Acicular Ferritic Ultrasonic Attenuation Bainite Structure 


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Copyright information

© Plenum Press, New York 1987

Authors and Affiliations

  • G. Canella
    • 1
  • M. Taddei
    • 1
  1. 1.Centro Sperimentale Metallurgico S.P.A.Roma (I)Italy

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