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dc.contributor.authorLeón-Cázares, FDen
dc.contributor.authorSchlütter, Reginaen
dc.contributor.authorJackson, Ten
dc.contributor.authorGalindo-Nava, EIen
dc.contributor.authorRae, Catherineen
dc.date.accessioned2019-10-29T00:31:37Z
dc.date.available2019-10-29T00:31:37Z
dc.date.issued2020-01-01en
dc.identifier.issn1359-6454
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/298152
dc.description.abstractPlastic deformation during low cycle fatigue in fcc materials with low stacking fault energy is accumulated in slip bands, which become preferential sites for crack initiation. Whilst these dislocation structures have been studied before, little has been done to assess the effect and evolution of the individual slip lines within them. In this study, samples of a γ′precipitate strengthened nickel-based superalloy are fatigued at room temperature and 700˚C for 1, 40 and 500 cycles.The resulting dislocation structures are characterised via Electron Channeling Contrast Imaging and Transmission Electron Microscopy. We introduce a new methodology to measure slip band parameters such as the slip line spacing and shear step length by analysing the holes left by sheared precipitates in γ′-etched secondary electron micrographs. Statistics of these parameters are obtained and compared for different conditions. Advantages of this technique include resolution at the scale of individual planes, acquisition of true three-dimensional data and applicability in the bulk of the material. The combination of these techniques provides a unique mechanistic and quantitative insight into the slip band and precipitate morphology evolution.
dc.description.sponsorshipConsejo Nacional de Ciencia y Tecnología Cambridge Commonwealth European and International Trust Roberto Rocca Education Program Royal Academy of Engineering Rolls-Royce plc Engineering and Physical Sciences Research Council
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleA multiscale study on the morphology and evolution of slip bands in a nickel-based superalloy during low cycle fatigueen
dc.typeArticle
prism.endingPage59
prism.publicationDate2020en
prism.publicationNameActa Materialiaen
prism.startingPage47
prism.volume182en
dc.identifier.doi10.17863/CAM.45209
dcterms.dateAccepted2019-10-11en
rioxxterms.versionofrecord10.1016/j.actamat.2019.10.033en
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2020-01-01en
dc.contributor.orcidRae, Catherine [0000-0002-8211-8437]
dc.identifier.eissn1873-2453
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idUNIVERSITY OF BIRMINGHAM (FB EPSRC) (EP/H022309/1)
pubs.funder-project-idEPSRC (EP/M005607/1)
pubs.funder-project-idEPSRC (EP/H500375/1)
pubs.funder-project-idEPSRC (1545848)
cam.orpheus.successThu Jan 30 10:36:30 GMT 2020 - Embargo updated*
rioxxterms.freetoread.startdate2021-01-01


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Attribution-NonCommercial-NoDerivatives 4.0 International
Except where otherwise noted, this item's licence is described as Attribution-NonCommercial-NoDerivatives 4.0 International