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An Evaluation of Flow Behavior during High Strain Rate Superplasticity in an Al-Mg-Sc Alloy

An Evaluation of Flow Behavior during High Strain Rate Superplasticity in an Al-Mg-Sc Alloy
An Evaluation of Flow Behavior during High Strain Rate Superplasticity in an Al-Mg-Sc Alloy
An Al-3 pct Mg-0.2 pct Sc alloy was fabricated by casting and subjected to equal-channel angular pressing to reduce the grain size to ~0.2 m. Very high tensile elongations were achieved in this alloy at temperatures over the range from 573 to 723 K, with elongations up to >2000 pct at temperatures of 673 and 723 K and strain rates at and above 10-2 s-1. By contrast, samples of the same alloy subjected to cold rolling (CR) yielded elongations to failure of <400 pct at 673 K. An analysis of the experimental data for the equal-channel angular (ECA)-pressed samples shows consistency with conventional superplasticity including an activation energy for superplastic flow which is within the range anticipated for grain boundary diffusion in pure Al and interdiffusion in Al-Mg solid solution alloys.
1073-5623
707-716
Komura, S.
ed6e34ef-beb3-45d4-9836-dfc3bdbdafce
Horita, Z.
84a80017-cbaf-4713-8346-6f69ac7ea63e
Furukawa, M.
8ea754fa-cd31-481d-b6b7-6a6968b1ee0e
Nemoto, M.
37afe672-c5b3-4566-a16b-42e031d64b2d
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Komura, S.
ed6e34ef-beb3-45d4-9836-dfc3bdbdafce
Horita, Z.
84a80017-cbaf-4713-8346-6f69ac7ea63e
Furukawa, M.
8ea754fa-cd31-481d-b6b7-6a6968b1ee0e
Nemoto, M.
37afe672-c5b3-4566-a16b-42e031d64b2d
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Komura, S., Horita, Z., Furukawa, M., Nemoto, M. and Langdon, T.G. (2001) An Evaluation of Flow Behavior during High Strain Rate Superplasticity in an Al-Mg-Sc Alloy. Metallurgical and Materials Transactions A, 32 (Supplement 1), 707-716.

Record type: Article

Abstract

An Al-3 pct Mg-0.2 pct Sc alloy was fabricated by casting and subjected to equal-channel angular pressing to reduce the grain size to ~0.2 m. Very high tensile elongations were achieved in this alloy at temperatures over the range from 573 to 723 K, with elongations up to >2000 pct at temperatures of 673 and 723 K and strain rates at and above 10-2 s-1. By contrast, samples of the same alloy subjected to cold rolling (CR) yielded elongations to failure of <400 pct at 673 K. An analysis of the experimental data for the equal-channel angular (ECA)-pressed samples shows consistency with conventional superplasticity including an activation energy for superplastic flow which is within the range anticipated for grain boundary diffusion in pure Al and interdiffusion in Al-Mg solid solution alloys.

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More information

Published date: 2001
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 38065
URI: http://eprints.soton.ac.uk/id/eprint/38065
ISSN: 1073-5623
PURE UUID: 38fd92b9-04e5-42e4-918b-334951702754
ORCID for T.G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 01 Jun 2006
Last modified: 28 Apr 2022 01:50

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Contributors

Author: S. Komura
Author: Z. Horita
Author: M. Furukawa
Author: M. Nemoto
Author: T.G. Langdon ORCID iD

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