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

Record type: Article

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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Citation

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), pp. 707-716.

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: 17 Jul 2017 15:40

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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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