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Steel hardness evaluation based on ultrasound velocity measurements

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Abstract:

Material properties such as strength, toughness or hardness are usually determined by destructive tests. However, continuous destructive measurements are generally difficult to perform during the production process, which creates a need for a fast and easy non-destructive method of material characterisation.

Material elastic parameters, such as Young's modulus, bulk modulus etc, can be directly evaluated using non-destructive methods based on the measurements of ultrasonic wave velocity (shear and longitudinal). However, strength or hardness cannot be determined directly from those parameters since they also depend on material microstructure, such as grain size and orientation, as well as other factors. This paper presents an experimental evidence that hardness of rolled martensitic steel can be evaluated based on the measurements of ultrasonic wave velocity and limited information of its chemical composition.

Document Type: Research Article

DOI: http://dx.doi.org/10.1784/insi.2010.52.11.592

Affiliations: 1 University of Science and Technology, Krakw, Poland. lukomskiagh.edu.pl

Publication date: November 1, 2010

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