Journal ArticleDOI
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
Citations
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Grain boundary misorientation and positron annihilation characteristics in steel Eurofer processed by equal channel angular pressing
TL;DR: In this paper, electron backscattered diffraction and positron annihilation lifetime measurements were performed on the ferritic-martensitic 9%Cr Eurofer steel processed by equal channel angular pressing (ECAP) at 550°C.
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Microstructural evolution and precipitate behavior of an AZ61 alloy plate processed with ECAP and electropulsing treatment
TL;DR: In this article , electron microscopy, X-ray diffraction and electron backscattering diffraction patterns were used to investigate the behavior of the β-Mg 17 Al 12 phase in the AZ61 alloy.
Journal ArticleDOI
Evolution of microstructure, phase composition and hardness in 316L stainless steel processed by high-pressure torsion
Moustafa El-Tahawy,Jenő Gubicza,Yi Huang,Hyelim Choi,Heeman Choe,János L. Lábár,Terence G. Langdon +6 more
TL;DR: In this article, the evolution of phase composition, microstructure and hardness in 316L stainless steel processed by high pressure torsion (HPT) was studied up to 20 turns.
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Enhancing mechanical properties of wires by a novel continuous severe plastic deformation method
TL;DR: In this article, an equal channel angular torsion drawing (ECATD) was used to deform commercially pure Al wires up to an equivalent strain of 1 to 4 at room temperature.
Journal ArticleDOI
Atomistic simulations of plasticity in heterogeneous nanocrystalline Ni lamella
TL;DR: In this paper, atomistic simulations were performed on heterogeneous nanocrystalline (NC) Ni lamella made up of alternating NC and single crystalline (SC) layers to explore the effect of the heterogeneous microstructure on their mechanical response.
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...