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...

High specific strength of the material is critical for many structural applications in automotive and aerospace design. Among many other approaches for strengthening the materials, development of superfine and nano grained microstructure is becoming popular. Different techniques for producing ultra-fine-grained (UFG) materials have been introduced especially in the last decade. The advantages o...

Department of Restorative Dentistry, Health Sciences Center, Federal University of Paraíba – UFPB, João Pessoa, PB, Brazil Department of Rsrtorative Dentistry, Goiania School of Dentistry, Federal University of Goias – UFG, Goiania, GO, Brazil Operative Dentistry and Dental Materials Division, Uberlândia School of Dentistry, Federal University of Uberlândia – UFU, Uberlândia, MG, Brazil Departm...

The enhanced mechanical properties obtained by refining the grain size down to ultrafine-grained (UFG) regime have attracted considerable attention in recent years. severe plastic deformation (SPD) techniques allow obtaining materials. Different SPD permit processing sheet shape materials such as repetitive corrugation and straightening (RCS) accumulative roll bonding (ARB). In this study, form...

Abstract This study addresses some aspects regarding a computer modelling based on three-dimensional Frontal Cellular Automata (FCA) for the simulation of ultrafine-grained (UFG) microstructure development in purpose-designed microalloyed austenite model alloy i.e. FCC structure. Proposed present is step forward towards understanding deformation and mechanisms occurring during severe plastic (S...

This study presents a comprehensive evaluation of Equal Channel Angular Pressing (ECAP) processing on the structural evolution and mechanical properties AA2xxx aluminum alloy. Finite element analysis (FE) was used to deformation behavior billets during in addition investigate strain homogeneity longitudinal transverse direction. Billets AA2011 alloy were processed successfully through ECAP up 4...

Background The severe plastic deformation approach and its well-known cyclic extrusion compression (CEC) method have been established as a powerful tool for fabricating bulk ultrafine-grained metals alloys with improved properties. Objective This study focused on the microstructure evolution, hardness behavior, corrosion properties of CEC-processed Al5052 up to four passes compared initial anne...

The Brazilian School Nutrition Program (PNAE) is a Food and Nutritional Security (SAN) strategy for public school students. This article seeks to discuss the challenges and opportunities of school nutrition in 'quilombola'* communities and report on the experience of the Cooperation Center for Student Food and Nutrition of the Federal University of Goiás and the Midwest Region (CECANE UFG/ Cent...

Esta pesquisa afirma a importância de se discutir sobre saúde da população negra dentro todas as áreas do conhecimento que engloba Universidade Federal Goiás (UFG) sob perspectiva o direito à é destinado redução riscos doenças e outros agravos. Com base nisso, este estudo objetiva identificar produção na negra. A metodologia bibliográfica exploratória, com abordagem quantitativa para mapear cie...