Paramatmuni, C., Zheng, Z., Rainforth, W.M. orcid.org/0000-0003-3898-0318 et al. (1 more author) (2020) Twin nucleation and variant selection in Mg alloys: An integrated crystal plasticity modelling and experimental approach. International Journal of Plasticity, 135. 102778. ISSN 0749-6419
Abstract
Extension twin nucleation and variant selection in magnesium alloy WE43 is investigated in experimentally characterised and deformed microstructures replicated in crystal plasticity models. Total stored (dislocation) energy density is found to identify the experimentally observed locations of twins which are not otherwise explained by global Schmid factors or local resolved shear stress criteria. A critical total stored energy of the order 0.015 Jm-2 is determined below which twin nucleation does not occur. The total stored energy density explains the locations of the observed twins and the absence of twins in parent grains anticipated to be favourable for twin nucleation. Twin variant selection has been shown to be driven by minimising locally stored shear energy density, while the geometric compatibility and strain compatibility factors only aid in partial prediction. All experimentally observed variants were correctly determined.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 Elsevier Ltd. This is an author produced version of a paper subsequently published in International Journal of Plasticity. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
Keywords: | HCP; Twin nucleation; Rare-earth alloy; Stored energy density; Variant selection; Crystal plasticity |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Funding Information: | Funder Grant number Engineering and Physical Sciences Research Council EP/L025213/1 ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/L025213/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 03 Mar 2021 14:48 |
Last Modified: | 08 Jul 2021 00:39 |
Status: | Published |
Publisher: | Elsevier BV |
Refereed: | Yes |
Identification Number: | 10.1016/j.ijplas.2020.102778 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:171770 |