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X-ray determination of stresses in alumina scales on high temperature alloys

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dc.contributor.authorSARIOĞLU, CEVAT
dc.contributor.authorsSarioglu, C; Schumann, E; Blachere, JR; Pettit, FS; Meier, GH
dc.date.accessioned2022-03-12T15:58:26Z
dc.date.available2022-03-12T15:58:26Z
dc.date.issued2000
dc.description.abstractThe resistance of alumina scales to cracking and spalling under the influence of growth and thermal stresses is a critical aspect of the environmental resistance of high temperature structural alloys, oxidation resistant coatings, and bond coats for thermal barrier coatings. However, the relative magnitudes of the stresses and their distribution are often not known. In this study several X-ray diffraction techniques are being used to measure the strains in alumina scales on a variety of high temperature alloys both during oxidation and after cooling to room temperature. The corresponding stresses are being calculated using appropriate elastic constants. The results include the observations that: (1) Growth stresses are higher in alumina formed on FeCrAl alloys as compared to that formed on nickel-base alloys, such as NiAl or single crystal superalloys (studies have not yet been performed on NiCrAl or CoCrAl alloys). (2) Yttrium additions to do not result in lower growth stresses in alumina scales on FeCrAl alloys even though the additions decrease the amount of lateral scale growth. (3) Growth stresses can be relaxed by plastic deformation of both the alloy and oxide. The implications of these results with regard to alumina adhesion are discussed.
dc.identifier.doi10.1179/mht.2000.017
dc.identifier.issn0960-3409
dc.identifier.urihttps://hdl.handle.net/11424/224064
dc.identifier.wosWOS:000087291000017
dc.language.isoeng
dc.publisherSCIENCE REVIEWS 2000 LTD
dc.relation.ispartofMATERIALS AT HIGH TEMPERATURES
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectXRD
dc.subjectstresses
dc.subjectalumina scales
dc.subjectOXIDATION
dc.subjectOXIDE
dc.subjectGROWTH
dc.subjectYTTRIUM
dc.subjectCREEP
dc.subjectADDITIONS
dc.subjectADHERENCE
dc.subjectBEHAVIOR
dc.subjectLAYERS
dc.titleX-ray determination of stresses in alumina scales on high temperature alloys
dc.typeconferenceObject
dspace.entity.typePublication
local.avesis.id1c234709-ed20-4211-8101-03dbd5a482ea
local.conference.dateSEP 20-22, 1999
local.conference.locationCAMBRIDGE, ENGLAND
local.conference.title4th International Conference on the Microscopy of Oxidation
local.import.packageSS15
local.indexed.atWOS
local.indexed.atSCOPUS
local.journal.numberofpages7
oaire.citation.endPage115
oaire.citation.issue1
oaire.citation.startPage109
oaire.citation.titleMATERIALS AT HIGH TEMPERATURES
oaire.citation.volume17
relation.isAuthorOfPublication6ec6d31d-4f25-485a-b1ea-0fe14f90a990
relation.isAuthorOfPublication.latestForDiscovery6ec6d31d-4f25-485a-b1ea-0fe14f90a990

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