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
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High-Pressure Torsion of Ti: Synchrotron characterization of phase volume fraction and domain sizes
Raul Eduardo Bolmaro,Vitor Luiz Sordi,Maurizio Ferrante,Heinz Günter Brokmeier,Megumi Kawasaki,Megumi Kawasaki,Terence G. Langdon,Terence G. Langdon +7 more
TL;DR: In this article, the same billets were further deformed by High-Pressure Torsion (HPT) at room temperature, varying both the hydrostatic pressure (1 and 6 GPa) and the number of rotations (n = 1 and 5).
Journal ArticleDOI
Effects of strain rate on the formation and the tensile behaviors of multimodal grain structure titanium
Tengfei Xu,Shiying Wang,Xiaochen Li,Minxian Wu,Wenchang Wang,Naotoshi Mitsuzaki,Zhidong Chen +6 more
TL;DR: In this article, the effects of rolling strain rate on the microstructure evolutions and tensile properties of multimodal grain structure titanium prepared by cryorolling upon annealing has been investigated.
Journal ArticleDOI
Microstructural homogeneity and superplastic behavior in an aluminum–copper eutectic alloy processed by high-pressure torsion
TL;DR: In this article, an Al-33% Cu eutectic alloy was processed by high-pressure torsion (HPT) at room temperature under a compressive pressure of 6.0 GPa for different revolutions up to 10 turns.
Journal ArticleDOI
Microstructure features and mechanical properties of a UFG Al-Mg-Si alloy produced via SPD
Elena V. Bobruk,Elena V. Bobruk,Ilchat Sabirov,V. U. Kazykhanov,Ruslan Z. Valiev,Ruslan Z. Valiev,M.Y. Murashkin,M.Y. Murashkin +7 more
TL;DR: In this article, the effect of equal channel angular pressing in parallel channels (ECAP-PC) and subsequient artificial ageing on the microstructure and room temperature mechanical properties of the commercial aluminum alloys 6063 (Al-0.6Mg- 0.5Si, wt.%) and 6010 (Al 0.8Mg 1.0Si-0.,15Cu-0,25Mn, wT.%) was investigated.
Journal ArticleDOI
White etching structures in annealed 52100 bearing steel arising from high-pressure torsion tests
TL;DR: In this article, a technique was selected to produce white etching structures in annealed AISI 52100 rolling bearings with the presence of severe plastic deformation conditions, which can be achieved by high pressure tension tests.
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...