A study of the effect high-pressure torsion (HPT) on structure, phase composition, corrosion resistance, mechanical properties and bioactivity in vitro Zn-1%Mg-0.1%Ca alloy was performed. It shown that HPT leads to refinement microstructure with formation recrystallized ?-Zn grains an average size 750 ± 30 nm, a mixture different phases 38 7 nm. In addition, precipitation Ca-enriched particles ...

Microstructural investigation of extremely strained samples, such as severely plastically deformed (SPD) materials, by using conventional transmission electron microscopy techniques is very challenging due to strong image contrast resulting from the high defect density. In this study, low angle annular dark field (LAADF) imaging mode of scanning transmission electron microscope (STEM) has been ...

Abstract. Ultrafine-grained S322750 superduplex stainless steel has been obtained through high-pressure torsion (HPT) process. Microstructural evolution after the severe plastic deformation (SPD) shown no phase transformation. Isothermal heat treatment was applied process in order to promote secondary precipitation. Precipitation enhanced ultrafine-grained comparison coarse-grained at same isot...

An as-cast AlCrFe2Ni2 high entropy alloy consisting of face-centered cubic (FCC), ordered body-centered (B2) and (BCC) solid solution phases was processed by high-pressure torsion (HPT) for up to 1 turn at room temperature inspection after processing revealed a transition from the B2 and/or BCC phase FCC phase. analysis energy dispersive spectrometry (EDS) showed that reasonably homogeneous che...

In composites, outstanding properties of two materials can be combined. particular, metal–matrix composites (MMCs) combine the a high-strength ductile metallic matrix with special embedded ceramic particles. This hybrid used to create functional material. However, during consolidation, thermal load most common MMC-processing routes is an obstacle for such functionalization, because unique phase...

Experiments were conducted to evaluate the evolution of stored energy in grains with shear texture orientations A1* {111}<1?1?2>, A2* {111}<12?1>, A {111}<11?0>, A? {111}<01?1>, B {112}<11?0>, B? {112}<11?0>and C {100}<110>for Cu-2.5Ni-0.6Si and Fe-36Ni (wt%) alloys after high-pressure torsion (HPT) processing up 10 turns at ambient temperature using a Kernel Average Misorientation (KAM) approa...

Severe plastic deformation response of a face centered cubic (FCC) twinning induced plasticity (TWIP) high entropy alloy (HEA), Fe40Mn40Co10Cr10, subjected to high-pressure torsion (HPT) is investigated. The so-called TWIP HEA demonstrated an extensive transformation (TRIP) effect even in ½ turn (shear strain, ? = 15) HPT processing, which increased further with increasing the number turns 2 (?...

The influence of additional deformation heat treatments (DHTs), implemented by two regimes: (1) annealing and small high-pressure torsion (HPT) at room temperature (RT) (2) HPT elevated to 10 turns RT, has been studied on the microstructure, mechanical properties electrical conductivity ultrafine-grained (UFG) Al-0.53Mg-0.27Zr (wt.%) alloy structured RT. As is shown, both types DHT lead a subst...

Abstract The tensile properties of an ultrafine-grained Al–9%Si–3%Cu alloy deposited by the laser powder bed fusion process have been investigated in this work. additively manufactured (AM) was subjected to high-pressure torsion processing at room temperature successfully different number turns HPT and then inspected through hot testing 298 573 K using strain rates ranging from 10 –1 –4 s −1 . ...

We combine magnetometry and magnetic small-angle neutron scattering to study the influence of microstructure on macroscopic properties a nanocrystalline Ni bulk sample, which was prepared by straining via high-pressure torsion (HPT). As seen magnetometry, mechanical deformation leads significant increase coercivity compared with nondeformed polycrystalline Ni. The data reveal spin-misalignment ...