The evolution of the structure and the defective substructure of rail steel under uniaxial compression up to 50% has been analyzed. It was revealed that the strain hardening had a multi-stage nature and was accompanied by the fragmentation of pearlite grains, which increased with increasing strain. An increase in the degree of deformation is accompanied by a decrease in the scalar and excess density of dislocations. The destruction of cementite plates proceeding through the mechanisms of their dissolution and cutting by mobile dislocations was discovered.
Ivanov et al. (Sat,) studied this question.