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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
Citations
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Heterogeneous lamella structure unites ultrafine-grain strength with coarse-grain ductility.
TL;DR: A heterogeneous lamella structure in Ti produced by asymmetric rolling and partial recrystallization that can produce an unprecedented property combination: as strong as ultrafine-grained metal and at the same time as ductile as conventional coarse- grained metal.
Journal ArticleDOI
Review on superior strength and enhanced ductility of metallic nanomaterials
TL;DR: In this article, the authors present an overview of experimental data and theoretical concepts addressing the unique combination of superior strength and enhanced ductility of metallic nanomaterials, and consider the basic approaches and methods for simultaneously optimizing their strength and ductility, employing principal deformation mechanisms, crystallographic texture, chemical composition as well as second-phase nano-precipitates, carbon nanotubes and graphene.
Journal ArticleDOI
A review on high-pressure torsion (HPT) from 1935 to 1988
TL;DR: In this article, the authors reviewed the findings of Bridgman and his successors from 1935 to 1988 using the HPT method and summarized their historical importance in recent advancement of materials, properties, phase transformations and HPT machine designs.
Journal ArticleDOI
Producing Bulk Ultrafine-Grained Materials by Severe Plastic Deformation: Ten Years Later
Ruslan Z. Valiev,Ruslan Z. Valiev,Yuri Estrin,Yuri Estrin,Zenji Horita,Terence G. Langdon,Terence G. Langdon,Michael J. Zehetbauer,Yuntian Zhu,Yuntian Zhu +9 more
TL;DR: The use of severe plastic deformation (SPD) has been extensively studied in the last decade as discussed by the authors, leading to the introduction of a range of nanostructural features, including nonequilibrium grain boundaries, deformation twins, dislocation substructures, vacancy agglomerates, and solute segregation and clustering.
Journal ArticleDOI
Fundamentals of superior properties in bulk NanoSPD materials
Ruslan Z. Valiev,Yuri Estrin,Zenji Horita,Terence G. Langdon,Terence G. Langdon,Michael J. Zehetbauer,Yuntian Zhu,Yuntian Zhu +7 more
TL;DR: In this article, the authors provide a critical overview of the properties of bulk nanoSPD materials, with a focus on the fundamentals for the observed extraordinary properties, including the unique nanostructures that lead to the superior properties, the underlying deformation mechanisms, critical issues that remain to be investigated, future research directions, and the application potential of such materials.
References
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Journal ArticleDOI
Evaluating plastic anisotropy in two aluminum alloys processed by equal-channel angular pressing
TL;DR: In this paper, the development of any plastic anisotropy during processing by equal-channel angular pressing (ECAP) was evaluated on two commercial aluminum alloys, Al-6061 and Al-7034, to evaluate the development.
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Severe Plastic Deformation as a Means of Producing Ultra-Fine-Grained Net-Shaped Micro Electro-Mechanical Systems Parts
TL;DR: In this paper, a miniaturized version of equal channel angular pressing (ECAP) is proposed to produce micro electro-mechanical systems (MEMS) parts, which can reach the desired grain refinement down to the micron scale and enhance the strength of the material.
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Age-hardening of an Al–Li–Cu–Mg alloy (2091) processed by high-pressure torsion
TL;DR: In this paper, the authors presented the successful strengthening of an Al-Li-Cu-Mg alloy (2091) through the simultaneous use of grain refinement and age hardening.
Journal ArticleDOI
Fabricating Ultrafine-Grained Materials through the Application of Severe Plastic Deformation: a Review of Developments in Brazil
TL;DR: The main processing techniques for SPD are equal-channel angular pressing and high-pressure torsion as mentioned in this paper, and the main contributions from Brazil in the field of SPD have been summarized and reviewed.
Journal ArticleDOI
The development of hardness homogeneity in a Cu–Zr alloy processed by equal-channel angular pressing
Jittraporn Wongsa-Ngam,Megumi Kawasaki,Megumi Kawasaki,Terence G. Langdon,Terence G. Langdon +4 more
TL;DR: In this paper, equal-channel angular pressing (ECAP) was used on a Cu-0.1% Zr alloy for 8 passes at room temperature using a die with a channel angle of 110°.