Abstract
Dependences of the coercive force of samples of St3-grade steel (with chemical composition Fe–0.324C–0.187Si–0.457Mn–0.026Cr–0.029Cu–0.008Co) during elastic and plastic tensile deformation are investigated. It is demonstrated that in the region of small deformations, plastic deformation is non-uniform over the length of the operating part of the sample. For well-annealed steel, the dependences of the coercive force on the elastic sample deformation became reversible, and for plastically deformed steel, a hysteresis is observed that increases with the degree of plastic deformation of the samples. Possible reasons for the hysteresis of the dependence of the coercive force on the elastic cyclic tensile deformations are discussed.
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