Validation and analysis of a model for grain refinement by cold severe plastic deformation
Validation and analysis of a model for grain refinement by cold severe plastic deformation
We present a model to predict grain refinement and strength/hardness of Al alloys after very high levels of cold deformation through techniques including cold rolling, equal channel angular pressing (ECAP), high pressure torsion (HPT), accumulative rolling bonding (ARB) and embossing. At the beginning of deformation, the generated dislocations are stored in grains and contribute to overall strength. With increase in strain, excess dislocations form and/or move to new cell walls/grain boundaries and grains are refined. The model is tested against data on a range of SPD processed Al based alloys. It is shown that grain size and strength/hardness are correctly predicted to a good accuracy. It is also shown that general trends in strengthening in all fcc pure metals are consistent with the model.
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Qiao, Xiaoguang
7fa1ecc9-febc-4ee6-9eb1-1d21a0e31741
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Qiao, Xiaoguang
7fa1ecc9-febc-4ee6-9eb1-1d21a0e31741
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Starink, M.J., Qiao, Xiaoguang and Gao, N.
(2012)
Validation and analysis of a model for grain refinement by cold severe plastic deformation.
TMS 2012: Annual Meeting and Exhibition, Orlando, FL, United States.
11 - 15 Mar 2012.
Record type:
Conference or Workshop Item
(Other)
Abstract
We present a model to predict grain refinement and strength/hardness of Al alloys after very high levels of cold deformation through techniques including cold rolling, equal channel angular pressing (ECAP), high pressure torsion (HPT), accumulative rolling bonding (ARB) and embossing. At the beginning of deformation, the generated dislocations are stored in grains and contribute to overall strength. With increase in strain, excess dislocations form and/or move to new cell walls/grain boundaries and grains are refined. The model is tested against data on a range of SPD processed Al based alloys. It is shown that grain size and strength/hardness are correctly predicted to a good accuracy. It is also shown that general trends in strengthening in all fcc pure metals are consistent with the model.
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e-pub ahead of print date: 2012
Venue - Dates:
TMS 2012: Annual Meeting and Exhibition, Orlando, FL, United States, 2012-03-11 - 2012-03-15
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 373323
URI: http://eprints.soton.ac.uk/id/eprint/373323
PURE UUID: 5c30a387-0ec5-4711-94e0-8f197ffe91c1
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Date deposited: 14 Jan 2015 17:27
Last modified: 11 May 2022 01:37
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Author:
Xiaoguang Qiao
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