Severe plastic deformation (SPD) is effective in producing bulk ultrafine-grained and
nanostructured materials with large densities of lattice defects. This field, also known as …

High-pressure torsion (HPT) method currently receives much attention as a severe plastic
deformation (SPD) technique mainly because of the reports of Prof. Ruslan Z. Valiev and his …

Positron is an excellent probe of lattice defects in solids. A thermallized positron delocalized
in lattice can be trapped at open volume defects, eg vacancies, dislocations, grain …

The ultrafine-grained microstructures, mechanical properties and electrical conductivity of a
Cu–0.87% Cr–0.06% Zr alloy subjected to multiple equal channel angular pressing (ECAP) …

High-pressure torsion (HPT) is an attractive processing method in severe plastic deformation
techniques involving the application of high compressive pressure with concurrent torsional …

Strengthening by grain refinement via the Hall–Petch mechanism and softening by
nanograin formation via the inverse Hall–Petch mechanism have been the subject of …

Ultra-severe plastic deformation (ultra-SPD) is defined as the SPD processes in which the
shear strains over 1,000 are introduced to a work piece. Despite significant activities on …

Severe plastic deformation (SPD) always leads to the strong grain refinement in the
materials. Logically, in two-and multiphase alloys SPD has to cause the fragmentation and …

A high density of lattice defects is introduced to materials by severe plastic deformation
(SPD). Numerous experimental techniques, in particular electron microscopy, X-ray, electron …

Severe plastic deformation (SPD) can induce various phase transformations. After a certain
strain, the dynamic equilibrium establishes between defects production by an external force …