Enhancement of strain-rate sensitivity and shear yield strength of a magnesium alloy processed by high-pressure torsion
Enhancement of strain-rate sensitivity and shear yield strength of a magnesium alloy processed by high-pressure torsion
A Mg–Zn–Zr alloy was processed by high-pressure torsion for up to 2 turns at room temperature to produce significant grain refinement together with enhanced plasticity and strength. Measurements were performed to determine the strain-rate sensitivity, shear yield strength and activation volume as a function of the processing conditions. The results suggest there is a significant contribution from grain boundary sliding to the flow process and the onset of plasticity is associated with heterogeneous dislocation nucleation.
grain boundary sliding, high-pressure torsion, magnesium alloy, strain-rate sensitivity, yielding
44-47
Choi, In-Chul
7a33a581-e44b-4f53-8ded-5e46af6f5506
Lee, Dong-Hyun
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Ahn, Byungmin
92fd09aa-9424-4020-ae74-02dd129f470f
Durst, Karsten
b2eb9c8f-0375-4c63-a488-e9f7147209d1
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Jang, Jae-il
c8160c1e-ce1b-4518-8a52-930cb9f54800
1 January 2015
Choi, In-Chul
7a33a581-e44b-4f53-8ded-5e46af6f5506
Lee, Dong-Hyun
ed19915c-a04e-468e-9246-7cd76b9c590c
Ahn, Byungmin
92fd09aa-9424-4020-ae74-02dd129f470f
Durst, Karsten
b2eb9c8f-0375-4c63-a488-e9f7147209d1
Kawasaki, Megumi
944ba471-eb78-46db-bfb7-3f0296d9ef6d
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Jang, Jae-il
c8160c1e-ce1b-4518-8a52-930cb9f54800
Choi, In-Chul, Lee, Dong-Hyun, Ahn, Byungmin, Durst, Karsten, Kawasaki, Megumi, Langdon, Terence G. and Jang, Jae-il
(2015)
Enhancement of strain-rate sensitivity and shear yield strength of a magnesium alloy processed by high-pressure torsion.
Scripta Materialia, 94, .
(doi:10.1016/j.scriptamat.2014.09.014).
Abstract
A Mg–Zn–Zr alloy was processed by high-pressure torsion for up to 2 turns at room temperature to produce significant grain refinement together with enhanced plasticity and strength. Measurements were performed to determine the strain-rate sensitivity, shear yield strength and activation volume as a function of the processing conditions. The results suggest there is a significant contribution from grain boundary sliding to the flow process and the onset of plasticity is associated with heterogeneous dislocation nucleation.
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Published date: 1 January 2015
Keywords:
grain boundary sliding, high-pressure torsion, magnesium alloy, strain-rate sensitivity, yielding
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 372287
URI: http://eprints.soton.ac.uk/id/eprint/372287
ISSN: 1359-6462
PURE UUID: 73467c1c-b022-4025-8a68-0033eca1c293
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Date deposited: 04 Dec 2014 16:43
Last modified: 15 Mar 2024 03:13
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Contributors
Author:
In-Chul Choi
Author:
Dong-Hyun Lee
Author:
Byungmin Ahn
Author:
Karsten Durst
Author:
Megumi Kawasaki
Author:
Jae-il Jang
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