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dc.contributor.authorZhang, Zhenbo; orcid: 0000-0003-4295-4796; email: zhangzhb1@shanghaitech.edu.cn
dc.contributor.authorYang, Zhibiao
dc.contributor.authorLu, Song
dc.contributor.authorHarte, Allan
dc.contributor.authorMorana, Roberto; orcid: 0000-0002-6125-7497
dc.contributor.authorPreuss, Michael; orcid: 0000-0003-3806-0415; email: michael.preuss@manchester.ac.uk
dc.date.accessioned2021-09-29T15:40:29Z
dc.date.available2021-09-29T15:40:29Z
dc.date.issued2020-09-29
dc.date.submitted2020-06-22
dc.identifierhttps://chesterrep.openrepository.com/bitstream/handle/10034/625983/41467_2020_18641_MOESM2_ESM.pdf?sequence=2
dc.identifierhttps://chesterrep.openrepository.com/bitstream/handle/10034/625983/41467_2020_18641_MOESM1_ESM.pdf?sequence=3
dc.identifierhttps://chesterrep.openrepository.com/bitstream/handle/10034/625983/additional-files.zip?sequence=4
dc.identifierhttps://chesterrep.openrepository.com/bitstream/handle/10034/625983/41467_2020_Article_18641.pdf?sequence=5
dc.identifierhttps://chesterrep.openrepository.com/bitstream/handle/10034/625983/41467_2020_Article_18641_nlm.xml?sequence=6
dc.identifier.citationNature Communications, volume 11, issue 1, page 4890
dc.identifier.urihttp://hdl.handle.net/10034/625983
dc.descriptionFrom Springer Nature via Jisc Publications Router
dc.descriptionHistory: received 2020-06-22, accepted 2020-08-21, registration 2020-09-04, pub-electronic 2020-09-29, online 2020-09-29, collection 2020-12
dc.descriptionPublication status: Published
dc.description.abstractAbstract: Twin boundaries (TBs) in Ni-based superalloys are vulnerable sites for failure in demanding environments, and a current lack of mechanistic understanding hampers the reliable lifetime prediction and performance optimisation of these alloys. Here we report the discovery of an unexpected γ″ precipitation mechanism at TBs that takes the responsibility for alloy failure in demanding environments. Using multiscale microstructural and mechanical characterisations (from millimetre down to atomic level) and DFT calculations, we demonstrate that abnormal γ″ precipitation along TBs accounts for the premature dislocation activities and pronounced strain localisation associated with TBs during mechanical loading, which serves as a precursor for crack initiation. We clarify the physical origin of the TBs-related cracking at the atomic level of γ″-strengthened Ni-based superalloys in a hydrogen containing environment, and provide practical methods to mitigate the adverse effect of TBs on the performance of these alloys.
dc.languageen
dc.publisherNature Publishing Group UK
dc.rightsLicence for this article: http://creativecommons.org/licenses/by/4.0/
dc.sourceeissn: 2041-1723
dc.subjectArticle
dc.subject/639/166/988
dc.subject/639/301/1023/303
dc.subject/639/301/1023/1026
dc.subject/123
dc.subject/119/118
dc.subjectarticle
dc.titleStrain localisation and failure at twin-boundary complexions in nickel-based superalloys
dc.typearticle
dc.date.updated2021-09-29T15:40:29Z
dc.date.accepted2020-08-21


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