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...

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...

Biocompatible β-type Ti-45Nb alloy with a low elastic modulus is promising in alleviating the stress shielding effect of Ti-based hard-tissue replacement implants. In this work, ultra-fine-grained (UFG) microstructures different grain sizes were prepared by multi-axial compression (MAC) processing alloys, and mechanical properties fretting wear alloys investigated. The results show that yield s...

Abstract Metals with a bimodal grain size distribution have been found to both high strength and good ductility. However, the coordinated deformation mechanisms underneath ultrafine-grains (UFGs) coarse grains (CGs) still remain undiscovered yet. In present work, Cu 80% volume fraction of recrystallized micro-grains was prepared by annealing equal-channel angular pressing (ECAP) processed ultra...

A criação de novas universidades no Brasil é um tema pouco estudado na história da educação brasileira. E uma lacuna que se abre nesse campo do conhecimento quem são essas universidades. O objetivo deste texto historicizar a UFG/CAC, partir seguinte questão: como UFG/CAC tratada nas narrativas constituídas tanto pelas atas reuniões, quanto pelos professores atuaram instituição, período 1986 200...

During last two decades great attention was paid to materials with grains of diameter smaller than 1 μm. These materials were classified as Ultra Fine Grain (UFG) materials with diameter of grains of the order of 100 to 1000 nm and nano-materials with mean diameters of grains smaller than 50 nm. This research concerned the whole production of UFG materials, using Severe Plastic Deformation (SPD...

Bread is a staple food consumed worldwide on a daily basis. Fungal contamination of bread is a critical concern for producers since it is related to important economic losses and safety hazards due to the negative impact of sensorial quality and to the potential occurrence of mycotoxins. In this work, Lactobacillus plantarum UFG 121, a strain with characterized broad antifungal activity, was an...

El presente estudio consiste en presentar los significados y tejer reflexiones sobre actores sociales el Museo Antropologico de la UFG, discutiendo brevemente las contribuciones historicas intelectuales brasilenos creacion instituciones museologicas nacionales. En este sentido, a traves del analisis material iconografico registros archivisticos museologicos periodo 1969-2017, es posible observa...

Abstract Constrained groove pressing (CGP) is one of the severe plastic deformation techniques for sheet metals to impose large strain and produce ultrafine-grained (UFG) structures without any change in dimensions. Cross route-constrained (Cross-CGP), an advanced version conventional CGP process, involves two cycles with equivalent 2.32 per cycle where square sample rotated by 90° after perfor...

Microscale dynamic testing is vital to the understanding of material behavior at application relevant strain rates. However, despite two decades intense micromechanics research, microscale metals has been largely limited quasi-static Here we report compression pristine 3D printed copper micropillars rates from $\sim0.001$ s$^{-1}$ $\sim500$ s$^{-1}$. It was identified that microcrystalline defo...