. Structural aspects of the diverse formation of plastic properties of fine and coarse‑grained low‑carbon steel.

An increase in the relative elongation with an increase in the ferrite grain size is due to an increase in the intensity of deformation hardening in the area of uniform deformation. An increase in the relative narrowing with a decrease in the size of the ferrite grain is associated with the predominant direction of expansion of the central crack along the axis of tension and with a decrease in the intensity of deformation hardening in the area of local deformation.