In the last years, nanostructured metals prepared by severe plastic deformation (SPD) techniques have emerged as a promising class of advanced biomaterials for load-bearing applications such orthopedic implants. This is mainly because simultaneous improvements in mechanical and biocompatibility properties during creation nanostructures. article provides brief overview effects SPD producing nano...

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...

To have an insight into the occurrence of inverse Hall-Petch relationship in ultrafine-grained (UFG) aluminum alloys produced by severe plastic deformation (SPD), ultra-SPD (i.e. inducing several ten thousand shear strains via high-pressure torsion, HPT) followed aging is applied to Al-La-Ce alloy. Average nanograin sizes 40 and 80 nm are successfully achieved together with strain-induced Lomer...

In the last three decades, several severe plastic deformation (SPD) procedures have been developed and applied in materials science to create bulk, ultrafine-grained (UFG) structures. As a consequence of SPD, not only submicron even nanometer grain sizes can be obtained, but also new boundaries with non-equilibrium structures material may formed. Therefore, both strength ductility UFG change si...

In this paper, cyclic flaring and sinking (CFS) as a new severe plastic deformation (SPD) method was employed to produce the ultrafine grain (UFG) copper tubes. The extra friction has eliminated in the CFS method that provided the possibility for production of longer UFG tubes compared to the other SPD methods. This process was done periodically to apply more strain and consequently finer grain...

The microstructural evolution during the equal channel angular (ECA) pressing process of an α+ θ′ two-phase Al-1.7at.%Cu alloy has been studied by transmission electron microscopy (TEM) and energy-filtered transmission electron microscopy (EF-TEM). The θ′ precipitates are fragmented into fine particles after a few passes of ECA perssing. The θ′ precipitates are almost completely dissolved after...

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...

Shape memory alloys (SMAs) are types of materials that can restore their original shape upon severe or quasi-plastic deformation, being exposed to specific external stimuli, including heating, electric current, magnetic field, etc. They a category functional provides superelasticity as significant material property. The roots this unintentional discovery were in the 20th century, and later it a...

Tetrataenite (L10-FeNi) is a promising candidate for use as permanent magnet free of rare-earth elements because its favorable properties such high magnetic anisotropy and coercivity. We report on structural Fe49Ni49Ti2 alloy after severe plastic deformation (SPD) by pressure torsion (HPT) technique. The main characteristics bulk HPT materials were determined. As result deformation, all samples...

High-pressure torsion (HPT) is a metal processing method in which the sample is subjected to a very high plastic shear deformation. This process can produce exceptional levels of grain refinement, and provides a corresponding improvement in mechanical properties. To investigate the stress and strain distribution due to HPT process finite element simulation were conducted to investigate effectiv...