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Influence of strain reversals during high pressure torsion process on strengthening in Al-Cu-Mg (-Li) alloy

Record type: Article

The strengthening of Al?Cu?Mg(?Li) alloys subjected to high pressure torsion (HPT) deformation with strain reversals was studied by microhardness (Hv) tests and differential scanning calorimetry (DSC). It was found that the strengthening is lower for both cyclic HPT (c-HPT) and single reversal HPT (sr-HPT) as compared to monotonic HPT (m-HPT). The DSC results demonstrate that |HPT influences S phase precipitation. With increasing strain, the maximum heat flow (height of the S peak) and the heat content of S formation peaks increases. There is a larger S heat content reaction in the periphery of HPT processed disks compared with those in the centre. Strain reversal also has a significant influence on the S precipitation. The strengthening during HPT deformation is discussed in terms of the density of statistically stored and geometrically necessary dislocations.

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Citation

Zhang, Jiu When, Starink, Marco J., Gao, Nong and Zhou, Wen Long (2010) Influence of strain reversals during high pressure torsion process on strengthening in Al-Cu-Mg (-Li) alloy Materials Science Forum, 667-669, pp. 809-814. (doi:10.4028/www.scientific.net/MSF.667-669.809).

More information

Published date: December 2010
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 170221
URI: http://eprints.soton.ac.uk/id/eprint/170221
ISSN: 1662-9752
PURE UUID: 83b3fbea-94d3-4d85-a138-fcc8ba9f0582

Catalogue record

Date deposited: 04 Jan 2011 14:31
Last modified: 18 Jul 2017 12:18

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Contributors

Author: Jiu When Zhang
Author: Nong Gao
Author: Wen Long Zhou

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