This paper presents an overview of fundamentals and potential applications ultrafine-grained Al-based conductors developed with the help severe plastic deformation (SPD) techniques. Based on deliberate formation nanoscale features (such as nanoprecipitates, segregation solutes along crystallographic defects so on) within ultrafine grains, it is possible to optimise their mechanical functional p...

Low-temperature friction-stir welding (FSW) was successfully applied for the joining of Al-Mg-Mn alloy with an ultrafine-grained microstructure. The low-temperature conditions preserved fine-grained microstructure and nano-scale second-phase particles in stir zone thus provided nearly-100% joint efficiency produced welds. deformation behavior welded joints studied via digital image correlation ...

It is well known that when coarse-grained metals undergo severe plastic deformation to be transformed into nano-grained metals, their ductility is reduced. However, there are no ductile fracture criteria developed based on grain refinement. In this paper, we propose a new relationship between ductile fracture and grain refinement during deformation, considering factors besides void nucleation a...

A generalized phase transformation kinetics model is used to understand the martensite to austenite transformation in a cold-rolled and annealed metastable AISI 301LN ultrafine-grained austenitic stainless steel. The model shows that the presence of interstitial nitrogen and heavy cold-rolling is important to promote fast transformation kinetics, through rapid nitrogen-diffusion and austenite n...

Equal channel multi angular pressing (ECMAP) process is the efficient method to enhance the productivity of ultra-fine grained (UFG) materials, by increasing process continuity and as a result decreasing process required time. Comparing repetitive ECAP method, in the same period, the number of passes can be done by ECMAP. In this article, ECMAP of AL strips in two typical annealed and as receiv...

The full annealing AA6061 aluminum alloy was subjected to severe plastic deformationvia the combination of equal channel angular pressing (ECAP) and cold rolling (CR) in order torefine its microstructure and to improve its mechanical properties. According to the results of hotand cold tensile tests, the combination of ECAP and CR significantly affected the final strengthand ductility of studied...

Santana Júnior PJ, Aurione ACV, Dangoni R, Gama RRM, Noleto TMA, Teixeira KISS. Which is your diagnosis? Radiol Bras. 2014 Jul/Ago;47(4):XI–XII. Study developed at Department of Radiology and Imaging Diagnosis of Hospital das Clínicas – Universidade Federal de Goiás (UFG), Goiânia, GO, Brazil. 1. Titular Member of Colégio Brasileiro de Radiologia e Diagnóstico por Imagem (CBR), Substitute Profe...