Journal ArticleDOI
Twenty-five years of ultrafine-grained materials: achieving exceptional properties through grain refinement
Reads0
Chats0
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
More filters
Journal ArticleDOI
Plastic deformation mechanisms in a severely deformed Fe-Ni-Al-C alloy with superior tensile properties
TL;DR: The back stress hardening was found to play a more important role in the CR samples than in the CG sample due to the dynamically reinforced heterogeneous microstructure by phase transformation, resulting in excellent tensile ductility in the severely deformed alloy.
Journal ArticleDOI
Synchrotron X-ray microbeam diffraction measurements of full elastic long range internal strain and stress tensors in commercial-purity aluminum processed by multiple passes of equal-channel angular pressing
Thien Q. Phan,Thien Q. Phan,Lyle E. Levine,I-Fang Lee,Ruqing Xu,Jonathan Z. Tischler,Yi Huang,Terence G. Langdon,Terence G. Langdon,Michael E. Kassner +9 more
TL;DR: In this paper, the full elastic long range internal strain and stress tensors of low dislocation density regions within the submicrometer grain/subgrain structure of equal-channel angular pressed (ECAP) aluminum alloy AA1050 after 1, 2, and 8 passes using route BC were measured.
Journal ArticleDOI
Influence of microstructure on fatigue of biocompatible β-phase Ti-45Nb
Mitra Delshadmanesh,Golta Khatibi,M. Zare Ghomsheh,Martin Lederer,Michael J. Zehetbauer,Herbert Danninger +5 more
TL;DR: In this paper, the influence of grain size on the mechanical properties and high cycle fatigue response of β-phase Ti-45Nb alloy has been studied, where severe plastic deformation was applied by using the high pressure torsion (HPT) technique in order to obtain an ultrafine grained (UFG) Ti 45Nb Alloy with enhanced mechanical properties without increasing the elastic modulus.
Journal ArticleDOI
Shape memory characteristics of a nanocrystalline TiNi alloy processed by HPT followed by post-deformation annealing
Hamed Shahmir,Mahmoud Nili-Ahmadabadi,Yi Huang,Yi Huang,Jaimyun Jung,Hyoung Seop Kim,Terence G. Langdon +6 more
TL;DR: In this paper, a martensitic TiNi shape memory alloy was processed by high-pressure torsion (HPT) for 1.5, 10 and 20 turns followed by post-deformation annealing (PDA) at 673 and 773 K for various times in order to study the microstructural evolution during the processing and the shape memory effect.
Journal ArticleDOI
The significance of strain weakening and self-annealing in a superplastic Bi-Sn eutectic alloy processed by high-pressure torsion
TL;DR: In this article, a cast Bi-Sn eutectic alloy was processed by high-pressure torsion (HPT) at room-temperature and stored at room temperature for durations of up to 91 days in order to investigate the effect of self-annealing.
References
More filters
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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...