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Developing superplasticity and a deformation mechanism map for the Zn–Al eutectoid alloy processed by high-pressure torsion

Kawasaki, Megumi and Langdon, Terence G. (2011) Developing superplasticity and a deformation mechanism map for the Zn–Al eutectoid alloy processed by high-pressure torsion Materials Science and Engineering: A, 528, (19-20), pp. 6140-6145. (doi:10.1016/j.msea.2011.04.053).

Record type: Article

Abstract

A Zn–22% Al eutectoid alloy was processed by high-pressure torsion (HPT) for 1, 3 and 5 turns at room temperature to produce an ultrafine grain size of ?350 nm. Tensile testing at a temperature of 473 K gave excellent superplastic properties with elongations to failure up to a maximum of 1800% at an imposed strain rate of 1.0 × 10?1 s?1: this is within the range of high strain rate superplasticity and represents the highest elongation recorded to date for a specimen processed by HPT. It is shown that the experimental data are in excellent agreement with a deformation mechanism map constructed for a temperature of 473 K

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e-pub ahead of print date: 22 April 2011
Published date: 25 July 2011
Keywords: deformation mechanism maps, flow mechanisms, high-pressure torsion, superplasticity, ultrafine grains
Organisations: Bioengineering Group

Identifiers

Local EPrints ID: 335076
URI: http://eprints.soton.ac.uk/id/eprint/335076
ISSN: 0921-5093
PURE UUID: f8e31c74-c3d9-45a8-8046-949c06176c2b
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 14 Mar 2012 08:48
Last modified: 18 Jul 2017 06:11

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Contributors

Author: Megumi Kawasaki

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