The processing of binary alloys consisting ferromagnetic Fe and antiferromagnetic Cr by severe plastic deformation (SPD) with different chemical compositions has been investigated. Although the phase diagram exhibits a large gap in thermodynamical equilibrium at lower temperatures, it is shown that techniques based on SPD help to overcome common limits. Different routes including initial ball m...

In this study, a crystal plasticity finite element method (CPFEM) model has been developed to investigate the anisotropic plastic behavior of (001) aluminum single crystal during high-pressure torsion (HPT). The distributions of equivalent plastic strain and Mises stress recorded on the sample surface are presented. The directional variations of plastic strain and Mises stress with the developm...

A high-pressure torsion (HPT) processed Fe-21Cr-5Ni-2Mo (mass%) two-phase stainless steel was used to study the morphology and crystallographic features of austenite (γ) precipitated from ferrite (α) during aging in (α + γ) region. The starting material a gas-atomized powder with completely ferritic structure. HPT process carried out produce fully dense compact under 6 GPa for 5 revolutions. gi...

Simulating the wheel/rail contact of a train is traditionally conducted using small-scale twin-disc testing. Here an emerging alternative method, “high pressure torsion” (HPT) test introduced. This has advantages over testing as only one cycle used and it easier to control third body layers during Shear stress data generated useful on its own, but can also be parameterise analytical prediction ...

Dendritic microstructures are frequently observed in as-solidified refractory high-entropy alloys (RHEAs), and their homogenization typically requires a long-term heat treatment at extremely high temperatures. High-pressure torsion (HPT) has been shown to be capable of mixing immiscible systems room temperature, therefore represents promising technique for homogenizing dendritic RHEAs. In this ...

A metastable β solution treated Ti15Mo alloy was deformed by high pressure torsion (HPT) resulting in a severely microstructure with density of lattice defects. In order to gain insight into the kinetics phase transformations, both non-deformed and HPT-deformed materials were studied in-situ during linear heating; evolution investigated using energy synchrotron X-ray diffraction (HEXRD) complem...

Achieving high yield strength via submicrometer grain size and nanoscaled precipitation has been reached in 7### aluminum alloys thanks to severe plastic deformation (SPD) by High Pressure Torsion (HPT) process. Unfortunately, this technique inherently strong limitations since only small parts can be processed the strain is not homogeneous. These prevent large scale production of Ultra Fine Gra...

Nowadays, the environmental crisis caused by using fossil fuels and CO2 emissions has become a universal concern in people’s life. Photocatalysis is promising clean technology to produce hydrogen fuel, convert harmful components such as CO2, degrade pollutants like dyes water. There are various strategies improve efficiency of photocatalysis so that it can be used instead conventional methods; ...

INTRODUCTION White Structure Flaking (WSF) is a type of surface damage responsible for some early failures in wind turbine gearbox bearings. WSF has been associated with microstructural changes registered close to the damaged surface that appear to be white after etching, hence the name White Etching Areas (WEAs). Local hydrogen liberation from lubricants [2] and adiabatic shear bands [3] have...