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Twenty-five years of ultrafine-grained materials: achieving exceptional properties through grain refinement
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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
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Effect of grain size and specimen dimensions on micro-forming of high purity aluminum
TL;DR: In this article, the effects on the flow stresses of the initial grain size and the specimen size were investigated and the results demonstrated that the occurrence of surface roughening is improved when using UFG pure Al.
Journal ArticleDOI
Effect of a minor titanium addition on the superplastic properties of a CoCrFeNiMn high-entropy alloy processed by high-pressure torsion
TL;DR: In this article, a CoCrFeNiMn high-entropy alloy with an addition of 2'at% Ti was processed by high-pressure torsion to produce a grain size of ~30'nm and then tested in tension at elevated temperatures from 873 to 1073'k using strain rates from 1.0'×'10−3 to 1'0'
Journal ArticleDOI
Interrelation between the Portevin Le-Chatelier effect and necking in AlMg alloys
Daria Zhemchuzhnikova,Mikhail Lebyodkin,Diana Yuzbekova,Tatiana Lebedkina,Tatiana Lebedkina,Anna Mogucheva,Rustam Kaibyshev +6 more
TL;DR: In this article, the effect of the Portevin Le-Chatelier (PLC) effect on the necking instability was studied in a binary and a precipitation-strengthened AlMg alloy using the digital image correlation (DIC) technique.
Journal ArticleDOI
A cross-shear deformation for optimizing the strength and ductility of AZ31 magnesium alloys.
Kotiba Hamad,Young Gun Ko +1 more
TL;DR: A cross-shear deformation imposed by a differential speed rolling (DSR) technique is used to improve the room temperature strength and ductility of AZ31 magnesium alloy sheets.
Journal ArticleDOI
Mechanical Properties of Ultrafine-Grained Metals: New Challenges and Perspectives
TL;DR: In this article, a unified view for the hardening behavior and early macroscopic strain localization of ultrafine-grained (UFG) materials manufactured by severe plastic deformation (SPD) was provided.
References
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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.
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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.
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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.
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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.
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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...