Flow behavior of a superplastic Zn–22% Al alloy processed by equal-channel angular pressing
Flow behavior of a superplastic Zn–22% Al alloy processed by equal-channel angular pressing
A Zn–22% Al eutectoid alloy was processed using equal-channel angular pressing (ECAP) to reduce the grain size to 0.8 ?m. A maximum elongation of 2230% was recorded in tensile testing at 473 K at a strain rate of 1.0 × 10?2 s?1. The significance of grain boundary sliding was evaluated by measuring the offsets in surface marker lines for samples pulled to an elongation of 30% at three different strain rates. The highest sliding contribution was recorded under testing conditions corresponding to the maximum superplastic elongation. Detailed measurements showed that relatively high sliding offsets were recorded at the Zn–Zn and Zn–Al interfaces whereas the offsets were smaller at the Al–Al interfaces. The measurements show that grain boundary sliding is a major flow process during superplastic deformation in the Zn–22% Al alloy processed by ECAP.
48-51
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
2009
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Kawasaki, Megumi and Langdon, Terence G.
(2009)
Flow behavior of a superplastic Zn–22% Al alloy processed by equal-channel angular pressing.
Materials Science and Engineering: A, 503 (1-2), .
(doi:10.1016/j.msea.2008.04.081).
Abstract
A Zn–22% Al eutectoid alloy was processed using equal-channel angular pressing (ECAP) to reduce the grain size to 0.8 ?m. A maximum elongation of 2230% was recorded in tensile testing at 473 K at a strain rate of 1.0 × 10?2 s?1. The significance of grain boundary sliding was evaluated by measuring the offsets in surface marker lines for samples pulled to an elongation of 30% at three different strain rates. The highest sliding contribution was recorded under testing conditions corresponding to the maximum superplastic elongation. Detailed measurements showed that relatively high sliding offsets were recorded at the Zn–Zn and Zn–Al interfaces whereas the offsets were smaller at the Al–Al interfaces. The measurements show that grain boundary sliding is a major flow process during superplastic deformation in the Zn–22% Al alloy processed by ECAP.
This record has no associated files available for download.
More information
Published date: 2009
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 67621
URI: http://eprints.soton.ac.uk/id/eprint/67621
ISSN: 0921-5093
PURE UUID: 2fe45d1c-ad4b-4bf5-ac65-c95fb2b76c29
Catalogue record
Date deposited: 02 Sep 2009
Last modified: 14 Mar 2024 02:47
Export record
Altmetrics
Contributors
Author:
Megumi Kawasaki
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
