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Superplastic flow in a nanostructured aluminum alloy produced using high-pressure torsion

Superplastic flow in a nanostructured aluminum alloy produced using high-pressure torsion
Superplastic flow in a nanostructured aluminum alloy produced using high-pressure torsion
Samples of a spray-cast Al-7034 alloy were processed by high-pressure torsion (HPT) at temperatures of 293 or 473 K using an imposed pressure of 4 GPa and torsional straining through five revolutions. Processing by HPT produced significant grain refinement with grain sizes of 60 and 85 nm at the edges of the disks for the two processing temperatures. In tensile testing at room temperature, the alloy processed by HPT exhibited higher strength and lower ductility than the unprocessed material. Good superplastic properties were achieved in tensile testing at elevated temperatures with a maximum elongation of 750% for the sample processed at 473 K and tested in tension at 703 K under an initial strain rate of 1.0 × 10?2 s?1. The measured superplastic elongations are lower than in samples prepared by equal-channel angular pressing because of the use of very thin disks in the HPT processing
aluminum alloy, high-pressure torsion, nanostructured materials, severe plastic deformation, superplasticity
0921-5093
170-175
Xu, Cheng
af526865-aee4-4ef6-8174-def5c38149a2
Dobatkin, Sergey V.
d3b1f98b-71ab-41fb-aace-d9491d22524c
Horita, Zenji
011521b8-3b29-494b-bf3f-346827ddbcce
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Xu, Cheng
af526865-aee4-4ef6-8174-def5c38149a2
Dobatkin, Sergey V.
d3b1f98b-71ab-41fb-aace-d9491d22524c
Horita, Zenji
011521b8-3b29-494b-bf3f-346827ddbcce
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Xu, Cheng, Dobatkin, Sergey V., Horita, Zenji and Langdon, Terence G. (2009) Superplastic flow in a nanostructured aluminum alloy produced using high-pressure torsion. Materials Science and Engineering: A, 500 (1-2), 170-175. (doi:10.1016/j.msea.2008.09.049).

Record type: Article

Abstract

Samples of a spray-cast Al-7034 alloy were processed by high-pressure torsion (HPT) at temperatures of 293 or 473 K using an imposed pressure of 4 GPa and torsional straining through five revolutions. Processing by HPT produced significant grain refinement with grain sizes of 60 and 85 nm at the edges of the disks for the two processing temperatures. In tensile testing at room temperature, the alloy processed by HPT exhibited higher strength and lower ductility than the unprocessed material. Good superplastic properties were achieved in tensile testing at elevated temperatures with a maximum elongation of 750% for the sample processed at 473 K and tested in tension at 703 K under an initial strain rate of 1.0 × 10?2 s?1. The measured superplastic elongations are lower than in samples prepared by equal-channel angular pressing because of the use of very thin disks in the HPT processing

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More information

Published date: January 2009
Keywords: aluminum alloy, high-pressure torsion, nanostructured materials, severe plastic deformation, superplasticity
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 67344
URI: https://eprints.soton.ac.uk/id/eprint/67344
ISSN: 0921-5093
PURE UUID: ea5c1f2f-e91c-417b-85d0-777d45ea5bbd
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 19 Aug 2009
Last modified: 06 Jun 2018 12:48

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