STUDY OF THE EFFECT OF PLASTIC DEFORMATION ON THE CRYSTALLOGRAPHIC TEXTURE AND ACOUSTIC CHARACTERISTICS OF LOW-ALLOY STEEL

he article presents the results of a study influence plastic deformation on change in coefficients orientation distribution function (ODF) W400 and W420 low-alloy steel 09G2S. To calculate ODF coefficients, velocities times propagation shear longitudinal bulk elastic waves their ratios were used. The physical interpretation is given. coefficient depicts effect birefringence waves, ratio linearly related to Poisson's ratio. Both are structurally sensitive characteristics used assess state materials by non-destructive testing methods. As study, it was found that characteristic areas tension diagram: yield area, area corresponding parabolic hardening, beginning neck formation, have display dynamics changes function. characterized an active texture. Hardening leads decrease intensity Expressions given relate value hardening under parameter acoustic anisotropy with deformation. calculated values according data measurements good agreement obtained analyzing tensile diagram. error determining magnitude method no more than 0.3%. It monitoring makes possible effectively plastically deformed method.