Journal ArticleDOI
Twenty-five years of ultrafine-grained materials: achieving exceptional properties through grain refinement
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TLDR
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
Citations
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Microstructure and mechanical properties of an MP159 alloy processed by torsional deformation and subsequent annealing
TL;DR: In this article, the evolutions of the microstructure and mechanical properties of the MP159 alloy after torsional deformation and subsequently annealing treatment were systematically investigated.
Journal ArticleDOI
Microstructural Evolution and Microhardness Variations in Pure Titanium Processed by High‐Pressure Torsion
Chen Wanji,Jie Xu,Detong Liu,Bao Jianxing,Shima Sabbaghianrad,Debin Shan,Bin Guo,Terence G. Langdon,Terence G. Langdon +8 more
Journal ArticleDOI
Microstructure and mechanical properties of 7005 aluminum alloy processed by one-pass equal channel reciprocating extrusion
TL;DR: In this paper, an equal channel reciprocating extrusion (ECRE) was proposed to obtain a severe plastic deformation (SPD) of 7005 alloy, which led to a mixed microstructure.
Journal ArticleDOI
Microstructural Evolution during Severe Plastic Deformation by Gradation Extrusion
Philipp Frint,M. Härtel,René Selbmann,Dagmar Dietrich,Markus Bergmann,Thomas Lampke,Dirk Landgrebe,Martin F.-X. Wagner +7 more
TL;DR: In this paper, the microstructural evolution of an age-hardenable AA6082 aluminum alloy during severe plastic deformation by gradation extrusion was studied and a novel die design allowing an interruption of processing and non-destructive billet removal was developed.
Journal ArticleDOI
Using dilatometry to study martensitic stabilization and recrystallization kinetics in a severely deformed NiTi alloy
Hamed Shahmir,Mahmoud Nili-Ahmadabadi,Alireza Razzaghi,Mahdi Mohammadi,Chuan Ting Wang,Chuan Ting Wang,Jaimyun Jung,Hyoung Seop Kim,Terence G. Langdon,Terence G. Langdon +9 more
TL;DR: In this article, a martensitic NiTi alloy was separately processed by equal-channel angular pressing, repetitive corrugation and straightening by rolling and cold rolling, and the kinetics of the recrystallization process were analyzed according to the Johnson-Mehl-Avrami-Kolmogorov theory.
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...