Abstract
Results of the research of dependence between the structural states of 40Kh-steel bar samples obtained with different modes of thermal processing and the velocity of longitudinal, transverse, and Rayleigh waves are presented. The mirror-shadow multiple reflection method with the use of dedicated pass-through and attachable electromagnetic–acoustic transducers was employed. A connection between the wave velocity and the ultimate strength, yield point, plasticity, and rigidity of the examined samples is demonstrated. Dependences of the acoustic wave velocity on mechanical tensile stresses are presented. The acoustoelastic coefficients are determined.
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