Dislocation structure of near surface layers of deformed low-carbon steel

Abstract

In this research character of dislocation distribution in cross-section of a sample of low-carbon steel at monotonic loading by use the method transmission microscopy was studied. The analysis has shown, that at all stages of deformation character of an arrangement and density of dislocations essentially varies at moving away from the surface in to depth of metal. Especially big difference between dislocation structures of near surface and internal layers of a material is observed in the field of the upper yield limit. Hence, distribution of dislocations in near surface layer of the deformed metal may not reflect processes of plastic flow of all metal as a whole, including its internal volumetric layers.