Thermal Treatment Effect and Structural State of Rod-Shaped Assortment 40Kh Steel on the Speed of Ultrasound Waves and Poisson Coefficientстатья
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Дата последнего поиска статьи во внешних источниках: 17 августа 2021 г.
Аннотация:Propagation rates of ultrasound waves and Poisson coefficients in the rolled stock from 40Kh steelafter various types and conditions of thermal treatment were studied. An unambiguous relationship of structuralstates and hardness with the rates of longitudinal, transversal, and Rayleigh waves and Poisson coefficientswith the approximation coefficients of 0.83–0.99 was determined. The developed procedures of studiesand special equipment, which implements a shadow–mirror technique of multiple reflections using contactlesstransmission and surface mount electromagnetic acoustic transducers, provide high exactness, reproducibility,and reliability of the acoustic structuroscopy methods.