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Twenty-five years of ultrafine-grained materials: achieving exceptional properties through grain refinement

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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.
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This article is published in Acta Materialia.The article was published on 2013-11-01. It has received 614 citations till now.

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Deformation microstructures, strengthening mechanisms, and electrical conductivity in a Cu–Cr–Zr alloy

TL;DR: In this paper, the performance of the multiple equal channel angular pressing (ECAP) at temperatures of 473-673 K was investigated. And the authors found that the contribution of dislocation strengthening to the overall increment of yield stress (YS) through ECAP was higher than that of grain size strengthening.
Journal ArticleDOI

Microstructure and properties of a CoCrFeNiMn high-entropy alloy processed by equal-channel angular pressing

TL;DR: In this paper, a CoCrFeNiMn high-entropy alloy (HEA) was processed by equal-channel angular pressing (ECAP) for up to four passes at 673 K and the results show that the strength increases gradually with increasing straining up to 1 GPa with an elongation to failure of ~ 35% after four passes of ECAP.
Journal ArticleDOI

Review: Modes and Processes of Severe Plastic Deformation (SPD).

Vladimir Segal
- 10 Jul 2018 - 
TL;DR: It is shown that correct analyses of the processing mechanics and technological parameters are essential for the comparison of SPD techniques and the development of effective industrial technologies.
References
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Journal ArticleDOI

The Deformation and Ageing of Mild Steel: III Discussion of Results

E O Hall
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...
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