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Microstructural evolution in a two-phase alloy processed by high-pressure torsion

Microstructural evolution in a two-phase alloy processed by high-pressure torsion
Microstructural evolution in a two-phase alloy processed by high-pressure torsion
Experiments were conducted to evaluate the microstructural evolution occurring in the Zn–22% Al eutectoid alloy when processed by high-pressure torsion (HPT) over a range of experimental conditions. Processing by HPT reduces the grain size and at the edges of the disks it produces agglomerates of Zn-rich and Al-rich grains lying in bands delineating the torsional straining. Unlike most metals processed by HPT, the measured hardness values are lower than in the initial annealed condition. This is due to a significant reduction during processing in the distribution of Zn precipitates which are visible within the Al-rich grains in the annealed condition. It is shown that all of the hardness measurements are mutually consistent when plotted against the calculated equivalent strain
hardness, high-pressure torsion, homogeneity, severe plastic deformation, zinc–aluminum alloys
1359-6454
919-930
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Ahn, Byungmin
92fd09aa-9424-4020-ae74-02dd129f470f
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Ahn, Byungmin
92fd09aa-9424-4020-ae74-02dd129f470f
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Kawasaki, Megumi, Ahn, Byungmin and Langdon, Terence G. (2010) Microstructural evolution in a two-phase alloy processed by high-pressure torsion. Acta Materialia, 58 (3), 919-930. (doi:10.1016/j.actamat.2009.10.007).

Record type: Article

Abstract

Experiments were conducted to evaluate the microstructural evolution occurring in the Zn–22% Al eutectoid alloy when processed by high-pressure torsion (HPT) over a range of experimental conditions. Processing by HPT reduces the grain size and at the edges of the disks it produces agglomerates of Zn-rich and Al-rich grains lying in bands delineating the torsional straining. Unlike most metals processed by HPT, the measured hardness values are lower than in the initial annealed condition. This is due to a significant reduction during processing in the distribution of Zn precipitates which are visible within the Al-rich grains in the annealed condition. It is shown that all of the hardness measurements are mutually consistent when plotted against the calculated equivalent strain

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More information

Published date: February 2010
Keywords: hardness, high-pressure torsion, homogeneity, severe plastic deformation, zinc–aluminum alloys
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 72357
URI: http://eprints.soton.ac.uk/id/eprint/72357
ISSN: 1359-6454
PURE UUID: eaf175ed-3590-4738-ab1b-b4629366e4c3
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 10 Feb 2010
Last modified: 14 Mar 2024 02:47

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Contributors

Author: Megumi Kawasaki
Author: Byungmin Ahn

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