The plastic deformation development in the crack vicinity of a low-carbon steel

Abstract

An “in situ” investigation has been performed on plasticity zone evolution in a loaded specimen in the vicinity of crack tip. The crack in the samples were grown by cyclic loading. The test material was located in different states: in the initial state, after the electric pulse treatment and after heat treatment. The deformation fields in the area of stress concentrator were numerically calculated. In the process of plastic flow of material the self-organizing structures at the crack tip have been installed. In the process of deformation of the self-organizing structure are capable of to disappear and reappear