Using severe plastic deformation to fabricate strong metal matrix composites
Using severe plastic deformation to fabricate strong metal matrix composites
The processing of bulk metals through the application of severe plastic deformation leads to significant grain refinement and a consequent strengthening of the material. High-pressure torsion (HPT) generally refers to the processing of disk samples and this technique is especially effective in producing extremely small grains. Recently, new experiments were conducted in which disks of two different alloys, based on aluminum and magnesium, were stacked together and then processed by HPT for up to 20 turns at room temperature. Analysis after processing revealed the formation of a multi-layered structure in the central region of the disks but with a true nanoscale microstructure containing different types of intermetallic compounds within an Al matrix leading to the formation of metal matrix nanocomposites at the disk edges. Measurements showed a lowering of density at the disk edges, thereby confirming the potential for using HPT to fabricate materials with exceptionally high strength-to-weight ratio.
46-52
Kawaski, Megumi
a5ca3e53-e6b0-4723-8b9c-147d2b4e6841
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
2017
Kawaski, Megumi
a5ca3e53-e6b0-4723-8b9c-147d2b4e6841
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Kawaski, Megumi and Langdon, Terence G.
(2017)
Using severe plastic deformation to fabricate strong metal matrix composites.
Materials Research, 20 (S1), .
(doi:10.1590/1980-5373-MR-2017-0218).
Abstract
The processing of bulk metals through the application of severe plastic deformation leads to significant grain refinement and a consequent strengthening of the material. High-pressure torsion (HPT) generally refers to the processing of disk samples and this technique is especially effective in producing extremely small grains. Recently, new experiments were conducted in which disks of two different alloys, based on aluminum and magnesium, were stacked together and then processed by HPT for up to 20 turns at room temperature. Analysis after processing revealed the formation of a multi-layered structure in the central region of the disks but with a true nanoscale microstructure containing different types of intermetallic compounds within an Al matrix leading to the formation of metal matrix nanocomposites at the disk edges. Measurements showed a lowering of density at the disk edges, thereby confirming the potential for using HPT to fabricate materials with exceptionally high strength-to-weight ratio.
Text
TGL-NANOMAT2017-accepted manuscript
- Author's Original
Text
1516-1439-mr-1980-5373-MR-2017-0218
- Version of Record
More information
Accepted/In Press date: 19 September 2017
e-pub ahead of print date: 23 October 2017
Published date: 2017
Identifiers
Local EPrints ID: 414278
URI: http://eprints.soton.ac.uk/id/eprint/414278
ISSN: 1516-1439
PURE UUID: 4f12381e-91c3-4afb-9835-cf43ad094fb9
Catalogue record
Date deposited: 21 Sep 2017 16:31
Last modified: 16 Mar 2024 03:28
Export record
Altmetrics
Contributors
Author:
Megumi Kawaski
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
