Abstract
In this study an attempt has been made to determine the influence of the deformation and the thermal treatment given to a steel forging on the ultrasonic velocity and its attenuation. Data obtained indicates that both the amount of deformation and the type of thermal treatment given to a forging influence the longitudinal ultrasonic velocity and attenuation. It was observed that with increasing degree of deformation, the ultrasonic velocity decreases, the velocity being found to be maximum for the normalised condition and the minimum for the hardened condition, in annealed samples the velocity lying between the two former values. Further, the ultrasonic velocity was found to increase with increasing tempering temperature. Attenuation decreases with the degree of deformation and was found to be minimum for the normalised case and maximum for the simply-forged case. In addition, attenuation was found to increase with increase in tempering temperature.
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