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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.
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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
The effect of equal channel angular pressing on hydrogen storage properties of a eutectic Mg-Ni alloy
TL;DR: A multipass equal channel angular pressing (ECAP) technique was applied to as-cast eutectic Mg Ni alloy to refine its microstructure down to sub-micrometer size of Mg and Mg 2 Ni grains.
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Micro-extrusion of ultra-fine grained aluminium
TL;DR: In this article, a cylindrical cup micro extrusion using UFG aluminium is described and the preparation of micro billets for the extrusion operation is discussed, as well as a comparison of the material behaviour and product characteristics.
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High strain rate superplasticity of submicrometer grained 5083 Al alloy containing scandium fabricated by severe plastic deformation
TL;DR: In this article, high strain rate superplasticity was obtained in a commercial 5083 Al alloy by introducing a ultrafine grained structure of 0.3 mm through severe plastic deformation and by adding a dilute amount of scandium (Sc) as a microstructure stabilizer.
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The significance of slippage in processing by high-pressure torsion
TL;DR: In this paper, the extent of slippage occurring when thin disks are processed by high-pressure torsion was measured on three materials: aluminum, copper, and iron.
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Accelerated growth of preosteoblastic cells on ultrafine grained titanium.
TL;DR: It was demonstrated that ECAP processing of titanium enhances MC3T3-E1 culture proliferation in a spectacular way, which suggests that bone implants made from ECAP processed titanium may promote bone tissue growth.