Summary
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.
The work was supported for under the terms of art. 55 of the ECSC convention.
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© 1987 Plenum Press, New York
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Canella, G., Taddei, M. (1987). Correlation between Ultrasonic Attenuation and Fracture Toughness of Steels. In: Bussière, J.F., Monchalin, JP., Ruud, C.O., Green, R.E. (eds) Nondestructive Characterization of Materials II. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-5338-6_25
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DOI: https://doi.org/10.1007/978-1-4684-5338-6_25
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