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3D DDD modelling of dislocation–precipitate interaction in a nickel-based single crystal superalloy under cyclic deformation

Bing Lin, Minsheng Huang, Liguo Zhao, Anish Roy, Vadim Silberschmidt, Nick Barnard, Mark Whittaker Orcid Logo, Gordon McColvin

Philosophical Magazine, Volume: 98, Issue: 17, Pages: 1550 - 1575

Swansea University Author: Mark Whittaker Orcid Logo

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DOI (Published version): 10.1080/14786435.2018.1447159

Abstract

Strain-controlled cyclic deformation of a nickel-based single crystal superalloy has been modelled using three-dimensional (3D) discrete dislocation dynamics (DDD) for both [0 0 1] and [1 1 1] orientations. The work focused on the interaction between dislocations and precipitates during cyclic plast...

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Published in: Philosophical Magazine
ISSN: 1478-6435 1478-6443
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa39234
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spelling 2018-05-14T14:56:56.3355617 v2 39234 2018-03-27 3D DDD modelling of dislocation–precipitate interaction in a nickel-based single crystal superalloy under cyclic deformation a146c6d442cb2c466d096179f9ac97ca 0000-0002-5854-0726 Mark Whittaker Mark Whittaker true false 2018-03-27 MTLS Strain-controlled cyclic deformation of a nickel-based single crystal superalloy has been modelled using three-dimensional (3D) discrete dislocation dynamics (DDD) for both [0 0 1] and [1 1 1] orientations. The work focused on the interaction between dislocations and precipitates during cyclic plastic deformation at elevated temperature, which has not been well studied yet. A representative volume element with cubic γ′-precipitates was chosen to represent the material, with enforced periodical boundary conditions. In particular, cutting of superdislocations into precipitates was simulated by a back-force method. The global cyclic stress–strain responses were captured well by the DDD model when compared to experimental data, particularly the effects of crystallographic orientation. Dislocation evolution showed that considerably high density of dislocations was produced for [1 1 1] orientation when compared to [0 0 1] orientation. Cutting of dislocations into the precipitates had a significant effect on the plastic deformation, leading to material softening. Contour plots of in-plane shear strain proved the development of heterogeneous strain field, resulting in the formation of shear-band embryos. Journal Article Philosophical Magazine 98 17 1550 1575 1478-6435 1478-6443 Dislocation–precipitate interaction, representative volume element, crystallographic orientation, dislocation structures, precipitation, slip bands 31 12 2018 2018-12-31 10.1080/14786435.2018.1447159 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2018-05-14T14:56:56.3355617 2018-03-27T09:09:29.2011864 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Bing Lin 1 Minsheng Huang 2 Liguo Zhao 3 Anish Roy 4 Vadim Silberschmidt 5 Nick Barnard 6 Mark Whittaker 0000-0002-5854-0726 7 Gordon McColvin 8 0039234-27032018095233.pdf lin2018.pdf 2018-03-27T09:52:33.7300000 Output 2336258 application/pdf Version of Record true 2018-03-27T00:00:00.0000000 true eng
title 3D DDD modelling of dislocation–precipitate interaction in a nickel-based single crystal superalloy under cyclic deformation
spellingShingle 3D DDD modelling of dislocation–precipitate interaction in a nickel-based single crystal superalloy under cyclic deformation
Mark Whittaker
title_short 3D DDD modelling of dislocation–precipitate interaction in a nickel-based single crystal superalloy under cyclic deformation
title_full 3D DDD modelling of dislocation–precipitate interaction in a nickel-based single crystal superalloy under cyclic deformation
title_fullStr 3D DDD modelling of dislocation–precipitate interaction in a nickel-based single crystal superalloy under cyclic deformation
title_full_unstemmed 3D DDD modelling of dislocation–precipitate interaction in a nickel-based single crystal superalloy under cyclic deformation
title_sort 3D DDD modelling of dislocation–precipitate interaction in a nickel-based single crystal superalloy under cyclic deformation
author_id_str_mv a146c6d442cb2c466d096179f9ac97ca
author_id_fullname_str_mv a146c6d442cb2c466d096179f9ac97ca_***_Mark Whittaker
author Mark Whittaker
author2 Bing Lin
Minsheng Huang
Liguo Zhao
Anish Roy
Vadim Silberschmidt
Nick Barnard
Mark Whittaker
Gordon McColvin
format Journal article
container_title Philosophical Magazine
container_volume 98
container_issue 17
container_start_page 1550
publishDate 2018
institution Swansea University
issn 1478-6435
1478-6443
doi_str_mv 10.1080/14786435.2018.1447159
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 1
active_str 0
description Strain-controlled cyclic deformation of a nickel-based single crystal superalloy has been modelled using three-dimensional (3D) discrete dislocation dynamics (DDD) for both [0 0 1] and [1 1 1] orientations. The work focused on the interaction between dislocations and precipitates during cyclic plastic deformation at elevated temperature, which has not been well studied yet. A representative volume element with cubic γ′-precipitates was chosen to represent the material, with enforced periodical boundary conditions. In particular, cutting of superdislocations into precipitates was simulated by a back-force method. The global cyclic stress–strain responses were captured well by the DDD model when compared to experimental data, particularly the effects of crystallographic orientation. Dislocation evolution showed that considerably high density of dislocations was produced for [1 1 1] orientation when compared to [0 0 1] orientation. Cutting of dislocations into the precipitates had a significant effect on the plastic deformation, leading to material softening. Contour plots of in-plane shear strain proved the development of heterogeneous strain field, resulting in the formation of shear-band embryos.
published_date 2018-12-31T03:49:48Z
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score 11.01306

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