Journal ArticleDOI
Twenty-five years of ultrafine-grained materials: achieving exceptional properties through grain refinement
Reads0
Chats0
TLDR
In this article, an overview of the more recent developments in this field, with special emphasis on the opportunities for achieving homogeneity in the as-processed materials and on the general characteristics of the mechanical properties achieved after SPD processing.About:
This article is published in Acta Materialia.The article was published on 2013-11-01. It has received 614 citations till now.read more
Citations
More filters
Journal ArticleDOI
Nanostructure development in refractory metals: ECAP processing of Niobium and Tantalum using indirect-extrusion technique
Babak Omranpour,Babak Omranpour,Babak Omranpour,Lembit Kommel,Valdek Mikli,Edgar Garcia,Jacques Huot +6 more
TL;DR: In this paper, a modified ECAP die by implementing the principles of indirect extrusion was fabricated to process refractory metals of Niobium and Tantalum, where the main advantage of this modified technique over conventional ECAP is the reduction of frictional force during extrusion.
Journal ArticleDOI
Resolving the geometrically necessary dislocation content in severely deformed aluminum by transmission Kikuchi diffraction
Soroosh Naghdy,Patricia Verleysen,Roumen Petrov,Roumen Petrov,Leo A.I. Kestens,Leo A.I. Kestens +5 more
TL;DR: In this paper, severe plastic deformation (SPD) is applied to commercially pure aluminum, and the microstructure of samples deformed up to an equivalent strain of 50 is investigated by electron backscatter diffraction (EBSD).
Journal ArticleDOI
Effect of applied pressure on microstructure development and homogeneity in an aluminium alloy processed by high-pressure torsion
Piotr Bazarnik,Barbara Romelczyk,Yi Huang,Małgorzata Lewandowska,Terence G. Langdon,Terence G. Langdon +5 more
TL;DR: In this article, the influence of applied pressure on the processing of an aluminium 5483 alloy by high-pressure torsion (HPT) was investigated and the results are dependent upon the applied pressure such that a higher pressure enhances the accumulation of defects and leads to a more rapid grain refinement.
Journal ArticleDOI
Plastic flow and microstructural instabilities during high-pressure torsion of Cu/ZnO composites
Yuanshen Qi,Anna Kosinova,Askar Kilmametov,Boris B. Straumal,Boris B. Straumal,Boris B. Straumal,Eugen Rabkin +6 more
TL;DR: In this paper, a detailed micro-structural analysis of the processed samples revealed a surprisingly high level of plastic deformation introduced in individual ZnO particles, even though they possess a much high hardness than the surrounding Cu disks.
Journal ArticleDOI
High strength–high conductivity nanostructured copper wires prepared by spark plasma sintering and room-temperature severe plastic deformation
Claire Arnaud,Claire Arnaud,Florence Lecouturier,David Mesguich,Nelson Ferreira,Geoffroy Chevallier,Claude Estournès,Alicia Weibel,Alain Peigney,Christophe Laurent +9 more
TL;DR: In this paper, a pure copper cylinder with micrometric grains was prepared by spark plasma sintering and wire-drawn at room temperature, and the ultimate tensile strength of the conducting wires was 600 MPa at room-temperature.
References
More filters
Journal ArticleDOI
The Deformation and Ageing of Mild Steel: III Discussion of Results
TL;DR: In this paper, an attempt is made to explain the observed phenomena in the yielding and ageing of mild steel, described in two previous papers, in the general terms of a grain-boundary theory.
Journal ArticleDOI
Bulk nanostructured materials from severe plastic deformation
TL;DR: In this article, the authors present methods of severe plastic deformation and formation of nanostructures, including Torsion straining under high pressure, ECA pressing, and multiple forging.
Journal ArticleDOI
Principles of equal-channel angular pressing as a processing tool for grain refinement
TL;DR: In this article, a review examines recent developments related to the use of ECAP for grain refinement including modifying conventional ECAP to increase the process efficiency and techniques for up-scaling the procedure and for the processing of hard-to-deform materials.
Journal ArticleDOI
Using high-pressure torsion for metal processing: Fundamentals and applications
TL;DR: High pressure torsion (HPT) is a well-known technique for metal forming as discussed by the authors, where samples are subjected to a compressive force and concurrent torsional straining.
Journal ArticleDOI
Diffusional Viscosity of a Polycrystalline Solid
TL;DR: In this article, it is suggested that mosaic boundaries and boundaries between grains of nearly the same orientation may not serve as sources or sinks of the diffusion currents, in which case the creep rate will depend only on the configuration of grain boundaries having a sizable orientation differen...