Prospects of development of new pilot-commercial SPD methods

Abstract

Presents four promising methods of severe plastic deformation (IPD) for the manufacture of long rods (wire rods) and sheet blanks of ultrafine-grained (UMP) metal materials, including the modification of equal-channel angular pressing (ECAPConform). In addition, the schemes of shear deformation by the methods of Multi-ECM-Conform, rotational forging and radial active alternating bending are presented. These processes are combined by the extremely non-monotonic nature of the deformation, which leads to the most efficient formation of a homogeneous and gradient structure and a UFG structure in metallic materials. Using computer simulation with the software Deform 3D, the stress-strain state for each method is investigated, its advantages and disadvantages are revealed. The methods used are tested in the manufacture of experimental samples and analysis of structural features. On the basis of the conducted research, the most probable areas of their application for the manufacture of products with an extended set of operational characteristics are determined.