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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The contribution of grain boundary sliding in tensile deformation of an ultrafine-grained aluminum alloy having high strength and high ductility
Tarang Mungole,Praveen Kumar,Megumi Kawasaki,Megumi Kawasaki,Terence G. Langdon,Terence G. Langdon +5 more
TL;DR: In this paper, an as-cast Al-7 % Si alloy was processed by high-pressure torsion (HPT) for up to 10 turns at temperatures of 298 or 445 K.
Journal ArticleDOI
Superplastic behavior and microstructure evolution of a fine-grained Mg–Y–Nd alloy processed by submerged friction stir processing
TL;DR: In this paper, a fine-grained Mg-Y-Nd alloy with an average grain size of 1.3μm and small second phases of 280nm was prepared by submerged friction stir processing (SFSP).
Journal ArticleDOI
Grain refinement in an AlEr alloy during accumulative continuous extrusion forming
TL;DR: In this article, the formation of ultra-fine grains results from a type of continuous dynamic recrystallization (CDRX) that is induced by large strains, which leads to an increase in the average orientation angle.
Journal ArticleDOI
Powder injection molding of biocompatible stainless steel biodevices
Muhammad Zubair Aslam,Faiz Ahmad,Puteri Sri Melor Megat Yusoff,Khurram Altaf,Mohd Afian Omar,Randall M. German +5 more
TL;DR: In this paper, a critical review on powder selection, manufacturing techniques, debinding processes, and sintering conditions of 316L stainless steel powders is presented, focusing on the influence of powder shape, powder size, powder-to-binder ratios and their effects on densification in terms of corrosion and mechanical properties.
Journal ArticleDOI
Evolution of hardness in ultrafine-grained metals processed by high-pressure torsion
TL;DR: In this paper, the authors demonstrate the hardness evolution in simple metals including high-purity Al, commercial purity aluminum Al-1050, ZK60A magnesium alloy and Zn-22% Al eutectoid alloy after processing by HPT.
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...