Microcantilever Fracture Tests of α-Cr Containing NiAl Bond Coats

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dc.date.accessioned2023-08-08T07:55:24Z
dc.date.available2023-08-08T07:55:24Z
dc.date.issued2022-01-08
dc.description.sponsorshipH2020 European Research Council. Grant Numbers: 725483, 949626; Open access funding enabled and organized by Projekt DEALeng
dc.identifierdoi:10.17170/kobra-202308048576
dc.identifier.urihttp://hdl.handle.net/123456789/14975
dc.language.isoeng
dc.relation.doidoi:10.1002/adem.202101429
dc.relation.projectid725483, 949626
dc.rightsNamensnennung 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectbond coatseng
dc.subjectfracture toughnesseseng
dc.subjectintermetallicseng
dc.subjectmicrocantilever bendingeng
dc.subject.ddc600
dc.subject.ddc660
dc.subject.swdVerbindungsschichtger
dc.subject.swdBruchzähigkeitger
dc.subject.swdIntermetallische Verbindungenger
dc.subject.swdBiegungger
dc.subject.swdThermomechanische Eigenschaftger
dc.titleMicrocantilever Fracture Tests of α-Cr Containing NiAl Bond Coatseng
dc.typeAufsatz
dc.type.versionpublishedVersion
dcterms.abstractMCrAlY bond coats are widely used as oxidation-resistant coatings on superalloys. The major phase is the thermally stable intermetallic β-NiAl phase. The addition of Cr increases the oxidation and corrosion resistance but leads to the formation of α-Cr precipitates. Both phases are brittle and limit the fracture toughness of these coatings. To study the influence of thermal exposure and the resulting changing chemical composition on the fracture properties, the fracture toughness of both phases is measured by notched microcantilever bending, after processing and after oxidation by thermal cycling. The fracture toughness of β-NiAl decreases during thermal cycling due to the depletion in Al, whereas the fracture toughness and the composition of α-Cr stay constant. As the fracture toughness of α-Cr is lower compared with β-NiAl, the formation of α-Cr precipitates is supposed to decrease the fracture toughness of the bond coat.eng
dcterms.accessRightsopen access
dcterms.creatorGabel, Stefan
dcterms.creatorGiese, Sven
dcterms.creatorWebler, Ralf Uwe
dcterms.creatorNeumeier, Steffen
dcterms.creatorGöken, Mathias
dcterms.source.articlenumber2101429
dcterms.source.identifiereissn:1527-2648
dcterms.source.issueIssue 7
dcterms.source.journalAdvanced Engineering Materialseng
dcterms.source.volumeVolume 24
kup.iskupfalse

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