Abstract

The dependence of the velocity of longitudinal, transversal and Rayleigh ultrasonic waves in cold-rolled and flat pressed medium carbon steel 30CrMnSiA on the degree of deformation was determined. The velocity of longitudinal ultrasonic waves is changing only at deformation degrees higher than 10 %. The velocity of transversal and Rayleigh ultrasonic waves increases monotonically throughout the range of deformations, and the change in velocities is 2.5 % and 2.2 %, respectively. Thus, it was established that the propagation velocity of transverse ultrasonic waves is suitable parameter for determining the degree of deformation.

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