Pure Mg samples are processed by high-pressure torsion (HPT) for up to ten turns at temperatures of 293 and 423 K. The microstructures these significantly refined bimodal structures obtained after 10 HPT processing both Tensile experiments conducted room temperature reveal the mechanical properties pure subjected different temperatures. yield strength increases with increasing numbers K whereas...

The evolutions of microstructure and texture the corrosion behaviour low light rare-earth containing Mg-1.4Nd heavy Mg-0.6Gd Mg-0.4Dy (wt.%) were evaluated compared after processing by high-pressure torsion (HPT) isochronal annealing at 250 450 °C for 1 h using electron backscatter diffraction (EBSD) electrochemical tests in a 3.5% NaCl solution. EBSD results show that dynamic recrystallisation...

Abstract The effects of severe plastic deformation (SPD) by means high pressure torsion (HPT) on the soft magnetic properties iron-based metallic glass Fe73.9Cu1Nb3Si15.5B6.6 are investigated. With this procedure, it has been possible for first time to consolidate and deform high-strength material with a minimum cracks. X-ray diffraction, differential mechanical scanning analyses, as well optic...

A356 aluminium alloy is subjected to heat treatment and high-pressure torsion (HPT) processing investigate the impact of combined treatments on alloy’s microstructure refinement, corrosion resistance hardness. The process was performed at room temperature for 0.75 5 turns. Subjecting Al a subsequent HPT produced more refined microstructure, which has effect enhancing hardness under fragmentatio...

Abstract. This presentation shows that superplasticity is achieved in hard-to-deform materials when they are processed by severe plastic deformation (SPD) through high-pressure sliding (HPS). The HPS process similar to the torsion (HPT) as straining made under high pressure highly constrained conditions. It applicable a sheet form of samples while HPT uses disks or rings, and thus it has advant...

Discs of an extruded AZ80 magnesium alloy were processed by high-pressure torsion (HPT) using 6.0 GPa up to 10 turns at different temperatures (296 K and 473 K). The disc surfaces and cross-sectional planes were examined before and after processing using scanning electron microscopy (SEM) and Vickers microhardness (Hv). The microhardness results at the surface show differences in the strength o...

In this study, the influence of high-pressure torsion (HPT) processing parameters and solution treatment (ST) on corrosion tribocorrosion behavior CoCrMo (CCM) alloys was investigated for possible usage in biomedical applications. The CCM by using potentiodynamic scanning (PDS) electrochemical impedance spectroscopy (EIS) tests. Tribocorrosion tests were carried out a reciprocating ball-on-plat...

Abstract Experiments were conducted to investigate, within the framework of a multiscale approach, mechanical enhancement, deformation and damage behavior copper–silicon carbide composites (Cu–SiC) fabricated by spark plasma sintering (SPS) combination SPS with high-pressure torsion (HPT). The properties metal–matrix determined at three different length scales corresponding macroscopic, micro- ...

We report on high-pressure torsion (HPT) processing of Si and related semiconducting materials, discuss their phase transformations electrical, thermal, optical properties. In-situ synchrotron x-ray diffraction revealed that the metastable bc8-structure Si-III r8-structure Si-XII in HPT-processed samples gradually disappeared hexagonal-diamond Si-IV appeared during annealing up to 473 K. The fo...

Magnetic-field-dependent unpolarized small-angle neutron scattering (SANS) experiments demonstrate that high-pressure torsion (HPT) straining induces spin misalignments in pure Ni, which persist magnetic fields up to 4 T. The spin-misalignment patterns are elongated perpendicular the applied field due an unusual predominant longitudinal $sin^2(\theta)$-type angular anisotropy. Such a contributi...