The University of Southampton
University of Southampton Institutional Repository

Low-temperature superplasticity in Al alloys processed by equal-channel angular pressing

Ota, Satoshi, Akamatsu, Hiroki, Neishi, Koji, Furukawa, Minoru, Horita, Zenji and Langdon, Terence G. (2002) Low-temperature superplasticity in Al alloys processed by equal-channel angular pressing Materials Transactions, 43, (10), pp. 2364-2369.

Record type: Article

Abstract

Equal-channel angular pressing (ECAP) was applied to achieve grain refinement of Al–3?mass%Mg alloys containing 0.2?mass%Sc, 0.2?mass%Fe or 0.1?mass%Zr. The thermal stability of the fine-grained structures was examined by conducting static annealing experiments. The fine grain sizes produced by ECAP were essentially retained up to a temperature of 523?K for the Fe-containing and Zr-containing alloys and up to a temperature as high as 773?K for the Sc-containing alloy. The three alloys with Sc, Fe and Zr additions were pulled to failure in tension at 523?K corresponding to 0.59Tm, where Tm is the absolute melting point of the alloy, and maximum elongations of ??640%, ??370% and ??390% were obtained at an initial strain rate of 3.3×10?4?s?1, respectively. Such elongations resulted in more than three times or approximately twice the elongation achieved in a binary Al–3%Mg alloy. It is shown that either Fe or Zr may be used as an alternative element in place of Sc to attain low temperature superplasticity. Tensile testing was also conducted on the Sc-containing ternary alloy at a temperature as low as 473?K corresponding to 0.54Tm. A maximum elongation of ??420% was attained at an initial strain rate of 3.3×10?4?s?1. This appears to be the lowest homologous temperature reported to date for superplasticty of Al-based alloys.

Full text not available from this repository.

More information

Published date: 2002
Keywords: superplasticity, equal-channel angular pressing (ECAP), aluminum-magnesium alloys, submicrometer grains, tensile test

Identifiers

Local EPrints ID: 23470
URI: http://eprints.soton.ac.uk/id/eprint/23470
ISSN: 1347-5320
PURE UUID: 7fb18fd1-d744-446f-9f78-abf90fe45eec
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 12 Feb 2007
Last modified: 17 Jul 2017 16:17

Export record

Contributors

Author: Satoshi Ota
Author: Hiroki Akamatsu
Author: Koji Neishi
Author: Minoru Furukawa
Author: Zenji Horita

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.

×