Self-Organization of Multiscale Structural Groups in a Low-Carbon Wire Subjected to Severe Drawing

Аннотация

The peculiarities of the mechanical parameters and atomic structure of wires made of 08G2S steel subjected to severe drawing with a combination of shear and classical circular drawing of different diameters. The split form of interference maximums (211) in X-ray diagrams of samples is evidence for delamination in families of the mentioned planes into contracted and extended groups, which is accompanied by the partial order–disorder phase transition with formation of the amorphized fraction from fragments of nanosized atomic groups of these planes (clusters). The dependence on steel deformation revealed the nature of the change in the symmetry of the distribution of structural groups relative to the angular position of the diffraction maximum from the planes (211). It is established that with increased deformation (ε > 30%) the intensities of coherent and incoherent X-ray CrK_α-emissions vary quantitatively, which proves the development of self-organizing processes contributing to the increase in the volume fraction of the order relative to the disorder in 08G2S steel, even subject to severe mechanical loading.