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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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Hydrogen-assisted failure in a bimodal twinning-induced plasticity steel: Delamination events and damage evolution
TL;DR: In this paper, the effect of the bimodal grain size distribution on the hydrogen susceptibility of a high-Mn fully austenitic twinning-induced plasticity (TWIP) steel was investigated by tensile testing under ongoing electrochemical hydrogen charging.
Journal ArticleDOI
Structure refinement upon ultrasonic melt treatment in a DC casting launder
Tungky Subroto,Dmitry G. Eskin,Dmitry G. Eskin,Christopher Beckwith,Ivan Skalicky,Dan Roberts,Iakovos Tzanakis,Iakovos Tzanakis,Koulis Pericleous +8 more
TL;DR: In this paper, an ultrasonic melt treatment (UST) in a launder upon pilot-scale direct chill (DC) casting of 152mm-diameter billets from an AA6XXX alloy with Zr addition is presented.
Journal ArticleDOI
Microhardness evolution of pure titanium deformed by equal channel angular extrusion
TL;DR: In this article, the Vickers microhardness measurements were investigated on both cross-sectional and longitudinal planes of the annealed, one-, two-, four-, and six-pass ECAEed titanium.
Journal ArticleDOI
Crystalline grain refinement toughened isotactic polypropylene through rapid quenching of stretched melt
TL;DR: In this article, the authors demonstrate a feasible strategy to fabricate the ultrafine-grained isotactic polypropylene (iPP) by rapid quenching of stretched melt.
Journal ArticleDOI
Evolution of microstructure and hardness in aluminum processed by High Pressure Torsion Extrusion
Babak Omranpour,Babak Omranpour,Babak Omranpour,Yulia Ivanisenko,Roman Kulagin,Lembit Kommel,E. Garcia Sanchez,Dayan Nugmanov,Torsten Scherer,Anita Heczel,Jenő Gubicza +10 more
TL;DR: In this paper, an investigation was conducted on aluminum samples (AA1050) to study the microstructure and hardness evolution during processing by High Pressure Torsion Extrusion (HPTE).
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...