Modelling the strength of ultrafine-grained and nanocrystalline fcc metals
Modelling the strength of ultrafine-grained and nanocrystalline fcc metals
A model for predicting the steady-state flow stress in ultrafine-grained and nanocrystalline face-centred cubic metals based on irreversible thermodynamics is presented. Grain size, temperature and strain-rate effects are incorporated. Nanoscale effects are accounted for via dislocation propagation and annihilation mechanisms invoking an Orowan-type dislocation glide mechanism, and a vacancy-mediated annihilation mechanism at the interface, respectively. Model predictions show good agreement with experiments for pure Cu and Al.
Dislocation density, Flow stress, Irreversible thermodynamics, Nanocrystalline, Ultrafine-grained
1113-1116
Huang, Mingxin
51ed1877-648a-47c1-81a7-f345f7270908
Rivera-Díaz-del-Castillo, Pedro E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
Bouaziz, Olivier
4db4de8c-1a14-4180-91e1-f602311f0727
van der Zwaag, Sybrand
ad11f134-8a43-4635-9feb-7c3d01158f4b
December 2009
Huang, Mingxin
51ed1877-648a-47c1-81a7-f345f7270908
Rivera-Díaz-del-Castillo, Pedro E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
Bouaziz, Olivier
4db4de8c-1a14-4180-91e1-f602311f0727
van der Zwaag, Sybrand
ad11f134-8a43-4635-9feb-7c3d01158f4b
Huang, Mingxin, Rivera-Díaz-del-Castillo, Pedro E.J., Bouaziz, Olivier and van der Zwaag, Sybrand
(2009)
Modelling the strength of ultrafine-grained and nanocrystalline fcc metals.
Scripta Materialia, 61 (12), .
(doi:10.1016/j.scriptamat.2009.09.004).
Abstract
A model for predicting the steady-state flow stress in ultrafine-grained and nanocrystalline face-centred cubic metals based on irreversible thermodynamics is presented. Grain size, temperature and strain-rate effects are incorporated. Nanoscale effects are accounted for via dislocation propagation and annihilation mechanisms invoking an Orowan-type dislocation glide mechanism, and a vacancy-mediated annihilation mechanism at the interface, respectively. Model predictions show good agreement with experiments for pure Cu and Al.
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More information
Accepted/In Press date: 4 September 2009
e-pub ahead of print date: 9 September 2009
Published date: December 2009
Keywords:
Dislocation density, Flow stress, Irreversible thermodynamics, Nanocrystalline, Ultrafine-grained
Identifiers
Local EPrints ID: 492812
URI: http://eprints.soton.ac.uk/id/eprint/492812
ISSN: 1359-6462
PURE UUID: b56447c9-4f40-427a-a84d-4af6a59cccc3
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Date deposited: 14 Aug 2024 17:03
Last modified: 15 Aug 2024 02:20
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Contributors
Author:
Mingxin Huang
Author:
Pedro E.J. Rivera-Díaz-del-Castillo
Author:
Olivier Bouaziz
Author:
Sybrand van der Zwaag
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