ПОРІВНЯННЯ ДВОХ ПІДХОДІВ ДО МОДЕЛЮВАННЯ ГРАНИЦІ ПРУЖНОСТІ СПЛАВІВ WC–Co ПІД ЧАС РОЗТЯГУВАННЯ

Abstract

The task of the scientific study is to explain the theoretical dependence obtained from the equations of the mechanics of thermoelasticity of composites for the elastic limit from the point of view of dislocation concepts of plastic deformations arising in real WC–Co hardmetals. To do this, we compare the solution of the model problem for the interaction of a screw dislocation with WC grains in WC–Co hardmetal with an estimate of the elastic limit of these alloys, carried out using the equations of thermoelasticity of two-phase composites. It is established that the theoretical dependence of the conditional elasticity limit for the WC–25%Co alloy practically coincides with the expression for estimating the yield point from below in the presence of a shear band in adjacent planes of the crystal lattice under tension. Thus, mathematical models created using the traditional mechanics of elastic composites are physically plausible and can be developed. Their application will allow controlling the accuracy of measuring the deformation characteristics of industrial grades of hardmetals