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

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/

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


Local EPrints ID: 170221
ISSN: 1662-9752
PURE UUID: 83b3fbea-94d3-4d85-a138-fcc8ba9f0582

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

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

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