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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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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.
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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
Application of bulk nanostructured materials in medicine
TL;DR: In this paper, a combination of severe plastic deformation with traditional metal forming process is used to produce a nanostructured material with high tensile and fatique strength and enhanced ductility.
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Continuous high-pressure torsion
Kaveh Edalati,Zenji Horita +1 more
TL;DR: Continuous high pressure torsion (CHPT) was developed as an expeditious process to effect severe plastic deformation as discussed by the authors, and sheets of high purity aluminum, copper, and iron were successfully processed by introducing intense shear strain under high pressure.
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Development of structural heterogeneities in a magnesium alloy processed by high-pressure torsion
TL;DR: In this paper, an investigation was conducted on a magnesium AZ31 alloy to determine whether the deformation process is homogeneous or heterogeneous during high-pressure torsion (HPT).
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Significance of stacking fault energy on microstructural evolution in Cu and Cu-Al alloys processed by high-pressure torsion
Xianghai An,Q.Y. Lin,Suxiang Wu,Z.F. Zhang,Roberto B. Figueiredo,Nong Gao,Terence G. Langdon +6 more
TL;DR: In this article, the authors investigated the influence of stacking fault energy (SFE) on the evolution of microstructural homogeneity and found that uniform microstructures are more readily achieved in materials with high or low SFE than in materials having medium SFE.
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Processing of nanostructured metals and alloys via plastic deformation
TL;DR: In this article, the principles of grain refinement by plastic deformation and an introduction to the reported processing techniques are given, and four most promising and promising techniques are described in detail: equal-channel angular pressing, high-pressure torsion, accumulative roll bonding, and surface mechanical attrition treatment for nanostructured surface layers.