A model of grain refinement and strengthening of Al alloys due to cold severe plastic deformation
A model of grain refinement and strengthening of Al alloys due to cold severe plastic deformation
This paper presents a model which quantitatively predicts grain refinement and strength/hardness of Al alloys after very high levels of cold deformation through processes including cold rolling, equal channel angular pressing (ECAP), multiple forging (MF), accumulative rolling bonding (ARB) and embossing. The model deals with materials in which plastic deformation is exclusively due to dislocation movement, which is in good approximation the case for aluminium alloys. In the early stages 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. We examine this model using both our own data as well as the data in the literature. It is shown that grain size and strength/hardness are predicted to a good accuracy.
grain refinement, SPD, EBSD, HPT, ARB, aluminium, dislocation, cell, strengthening, dispersoid
446-470
Qiao, Xiao Guang
7818f3c0-44d5-417d-b25c-e3ddbd533738
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Starink, Marco J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
2012
Qiao, Xiao Guang
7818f3c0-44d5-417d-b25c-e3ddbd533738
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Starink, Marco J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Qiao, Xiao Guang, Gao, Nong and Starink, Marco J.
(2012)
A model of grain refinement and strengthening of Al alloys due to cold severe plastic deformation.
Philosophical Magazine, 92 (4), .
(doi:10.1080/14786435.2011.616865).
Abstract
This paper presents a model which quantitatively predicts grain refinement and strength/hardness of Al alloys after very high levels of cold deformation through processes including cold rolling, equal channel angular pressing (ECAP), multiple forging (MF), accumulative rolling bonding (ARB) and embossing. The model deals with materials in which plastic deformation is exclusively due to dislocation movement, which is in good approximation the case for aluminium alloys. In the early stages 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. We examine this model using both our own data as well as the data in the literature. It is shown that grain size and strength/hardness are predicted to a good accuracy.
Text
A_model_of_grain_refinement_and_strengthening__Phil_Mag_for_web.pdf
- Accepted Manuscript
More information
Published date: 2012
Keywords:
grain refinement, SPD, EBSD, HPT, ARB, aluminium, dislocation, cell, strengthening, dispersoid
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 185109
URI: http://eprints.soton.ac.uk/id/eprint/185109
ISSN: 0141-8610
PURE UUID: bc6279aa-4bf2-49f8-980e-7de717a6196f
Catalogue record
Date deposited: 09 May 2011 14:26
Last modified: 15 Mar 2024 03:10
Export record
Altmetrics
Contributors
Author:
Xiao Guang Qiao
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
