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
919-930
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Ahn, Byungmin
92fd09aa-9424-4020-ae74-02dd129f470f
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
February 2010
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), .
(doi:10.1016/j.actamat.2009.10.007).
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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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
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Date deposited: 10 Feb 2010
Last modified: 14 Mar 2024 02:47
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Author:
Megumi Kawasaki
Author:
Byungmin Ahn
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