Journal ArticleDOI
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.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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Review: Overcoming the paradox of strength and ductility in ultrafine-grained materials at low temperatures
TL;DR: In this article, the so-called paradox of strength and ductility of UFG materials is examined and a new quantitative diagram is presented which permits the easy insertion of experimental data.
Journal ArticleDOI
Influence of severe plastic deformation at cryogenic temperature on grain refinement and softening of pure metals: Investigation using high-pressure torsion
Kaveh Edalati,Kaveh Edalati,Jorge M. Cubero-Sesin,Jorge M. Cubero-Sesin,Ali Alhamidi,Ali Alhamidi,Intan Fadhlina Mohamed,Intan Fadhlina Mohamed,Zenji Horita,Zenji Horita +9 more
TL;DR: In this paper, the effect of impurities on grain size, hardness-strain behavior and self-annealing was also studied after cryogenic-HPT, which led to extra softening and/or formation of coarser grains.
Journal ArticleDOI
Structural impact on the Hall–Petch relationship in an Al–5Mg alloy processed by high-pressure torsion
TL;DR: In this article, the evolution of microstructure and microhardness was studied in a commercial 5483 Al-5Mg alloy processed by high pressure torsion (HPT) under a pressure of 6.0 GPa up to 10 turns.
Journal ArticleDOI
Microstructure and anisotropic mechanical behavior of the high-strength and ductility AZ91 Mg alloy processed by hot extrusion and multi-pass RD-ECAP
Bingqian Xu,Jiapeng Sun,Zhenquan Yang,Lirong Xiao,Hao Zhou,Jing Han,Huan Liu,Yuna Wu,Yuchun Yuan,Xiaoru Zhuo,Dan Song,Jinghua Jiang,Aibin Ma +12 more
TL;DR: In this article, a combined processing route of hot extrusion with multi-pass rotary die equal channel angular pressing (RD-ECAP) was applied to AZ91 Mg alloy with the aim of simultaneously improving its strength and ductility.
Journal ArticleDOI
The Effects of Severe Plastic Deformation and/or Thermal Treatment on the Mechanical Properties of Biodegradable Mg-Alloys
Andrea Ojdanic,Jelena Horky,Bernhard Mingler,Mattia Fanetti,Sandra Gardonio,Matjaz Valant,Bartosz Sułkowski,Erhard Schafler,Dmytro Orlov,Michael J. Zehetbauer +9 more
TL;DR: In this paper, five MgZnCa alloys with low alloy content and high biocorrosion resistance were investigated during thermomechanical processing, and the effect of vacancy hardening was substantiated by combined quantitative evaluations from differential scanning calorimetry and X-ray line profile analysis.
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...