Nano-Dimensional Elements in the Structure of Zinc Subjected to KOBO Extrusion

Abstract

AbstractIn the study of plastic flow and mechanical features of zinc subjected to severe plastic deformation at low temperature through the KOBO extrusion method, three techniques of micro and nanostructure identification have been used (TEM, STEM, HAADF). It was shown that the pattern of long trails—a typical element of microstructure after the KOBO deformation, results from strain fields of densely spaced nano-dimensional clusters of point defects—SIA clusters. The presence of satellite spots on the diffraction pattern was explained by a periodic arrangement of clusters which takes the form of a modulated lattice with a nano-sized wavelength.