A commercially pure Cu and a Cu-8 wt.%Sn alloy were subjected to high pressure torsion (HPT) study the effect of Sn as solute element deformation rate on grain refinement mechanism defect accumulation in Cu. The microstructure hardness produced ultrafine grained (UFG) states both materials carefully characterized. We show that addition leads significant decrease size, higher stored energy incre...

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...

In this work, we study the influence of surface properties ultrafine grained (UFG) and coarse (CG) titanium on morphology, viability, proliferation differentiation osteoblast-like MG-63 cells. Wet chemical etching in H2SO4/H2O2 NH4OH/H2O2 solutions was used for producing surfaces with varying topography, composition wettability. The topography morphology have been studied by scanning electron m...

Metastable austenitic steels having ultrafine grained (UFG) microstructures can be fabricated by conventional cold rolling and annealing processes utilizing the deformation-induced martensitic transformation during its reverse to austenite upon annealing. However, such are not applicable when has high mechanical stability against transformation, since there is no sufficient amount of martensite...

In this study, bulk ultrafine-grained and micro-crystalline cobalt was prepared using a combination of high-energy ball milling and subsequent spark plasma sintering. The average grain sizes of the ultrafine-grained and micro-crystalline materials were 200 nm and 1 μm, respectively. Mechanical properties such as the compressive yield strength, the ultimate compressive strength, the maximum comp...

Parallel Tubular Channel Angular Pressing (PTCAP) process is a novel recently developed severe plastic deformation (SPD) method for producing ultrafine grained (UFG) and nanograined (NG) tubular specimens with excellent mechanical and physical properties. This process has several advantageous compared to its TCAP counterparts. In this paper, a fine grained AZ91 tube was fabricated via multi pas...

High-purity Ni was processed by high-pressure torsion (HPT) at room temperature under an imposed pressure of 6.0 GPa and a rotation rate 1 rpm through 1/4 to 10 turns, samples were then examined using Electron Back-Scattered Diffraction (EBSD) microhardness measurements. The results show that the grain size low-angle boundaries (LAGBs) gradually decrease with growth HPT revolutions while values...

Effect of strain energy on corrosion behavior ultrafine-grained (UFG) copper prepared by severe plastic deformation (SPD) was investigated in terms microstructural evolution. The SPD processed material showed an structure after grain refinement for several time processes, which will affect mechanical and Homogeneity can be obtained efficiently through the pressing process commonly known as simp...

Low-temperature superplasticity (LTS) is crucial to reduce manufacturing cost and enhance the applications of superplastic forming. It well known that grain refinement key point decrease temperature at which attained. Therefore, ultrafine-grained (UFG) materials have become attractive for achieving LTS. Severe plastic deformation (SPD) techniques provide abnormal refinement, thus they been used...

Austenitic stainless steels are extensively used in various applications requiring good corrosion resistance and formability. In the current study, the formation of nano/ ultrafine grained austenitic microstructure in a microalloyed AISI 304L stainless steel was investigated by the advanced thermomechanical process of reversion of strain-induced martensite. For this purpose, samples were subjec...