The University of Southampton
University of Southampton Institutional Repository

An analysis of superplastic flow after processing by ECAP

An analysis of superplastic flow after processing by ECAP
An analysis of superplastic flow after processing by ECAP
Processing by equal-channel angular pressing (ECAP), when carried out optimally, produces submicrometer grain sizes, arrays of equiaxed grains and a significant fraction of high-angle grain boundaries. These conditions are appropriate for achieving high strain rate and/or low temperature superplasticity. This paper reviews experimental results describing superplastic flow in an Al–Mg–Sc alloy after ECAP. It is shown that the experimental data are in good agreement with a model for superplasticity developed for conventional superplastic alloys and based on grain boundary sliding accommodated by the intragranular flow of dislocations. In addition, an analysis shows the region of superplastic flow lies very close to, or even exceeds, the predicted transition between the viscous glide of dislocations and the breakaway of dislocations from their solute atmospheres.
aluminum alloys, creep mechanisms, equal-channel angular pressing, grain boundary sliding, superplasticity
0921-5093
476-479
Balasubramanian, N.
eb9290dd-f0f0-4237-86d1-ff2f46e396af
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Balasubramanian, N.
eb9290dd-f0f0-4237-86d1-ff2f46e396af
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Balasubramanian, N. and Langdon, Terence G. (2005) An analysis of superplastic flow after processing by ECAP. Materials Science and Engineering: A, 410-411, 476-479. (doi:10.1016/j.msea.2005.08.090).

Record type: Article

Abstract

Processing by equal-channel angular pressing (ECAP), when carried out optimally, produces submicrometer grain sizes, arrays of equiaxed grains and a significant fraction of high-angle grain boundaries. These conditions are appropriate for achieving high strain rate and/or low temperature superplasticity. This paper reviews experimental results describing superplastic flow in an Al–Mg–Sc alloy after ECAP. It is shown that the experimental data are in good agreement with a model for superplasticity developed for conventional superplastic alloys and based on grain boundary sliding accommodated by the intragranular flow of dislocations. In addition, an analysis shows the region of superplastic flow lies very close to, or even exceeds, the predicted transition between the viscous glide of dislocations and the breakaway of dislocations from their solute atmospheres.

Full text not available from this repository.

More information

Published date: 2005
Additional Information: The Langdon Symposium: Flow and forming of Crystalline Materials
Keywords: aluminum alloys, creep mechanisms, equal-channel angular pressing, grain boundary sliding, superplasticity
Organisations: Engineering Sciences

Identifiers

Local EPrints ID: 23811
URI: http://eprints.soton.ac.uk/id/eprint/23811
ISSN: 0921-5093
PURE UUID: 98056d71-b213-4e6f-9926-c0df20284108
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 21 Mar 2006
Last modified: 26 Nov 2019 01:49

Export record

Altmetrics

Contributors

Author: N. Balasubramanian

University divisions

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

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×