Effects of roughness on stresses in an oxide scale formed on a superalloy substrate

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dc.contributor.authorZhao, Yang
dc.contributor.authorSun, Fan
dc.contributor.authorJiang, Peng
dc.contributor.authorSun, Yongle
dc.date.accessioned2021-04-26T12:18:07Z
dc.date.available2021-04-26T12:18:07Z
dc.date.issued2021-04-19
dc.description.abstractThe effects of surface roughness on the stresses in an alumina scale formed on a Fecralloy substrate are investigated. Spherical indenters were used to create indents with different radii and depths to represent surface roughness and then the roughness effect was studied comprehensively. It was found that the residual stresses in the alumina scale formed around the rough surface are almost constant and they are dominated by the curvature rather than the depth of the roughness. Oxidation changes the surface roughness. The edge of the indent was sharpened after oxidation and the residual stress there was released presumably due to cracking. The residual stresses in the alumina scale decrease with increase in oxidation time, while the substrate thickness has little effect, given that the substrate is thicker than the alumina scale. Furthermore, the effect of roughness on the oxide growth stress is analysed. This work indicates that the surface roughness should be considered for evaluation of stresses in coatings.en_UK
dc.identifier.citationZhao Y, Sun F, Jiang P, Sun Y. (2021) Effects of roughness on stresses in an oxide scale formed on a superalloy substrate, Coatings, Volume 11, Issue 4, April 2021, Article number 479en_UK
dc.identifier.issn2079-6412
dc.identifier.urihttps://doi.org/10.3390/coatings11040479
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/16614
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectthermal barrier coatingsen_UK
dc.subjectFeCrAlYen_UK
dc.subjectaluminaen_UK
dc.subjectcurvatureen_UK
dc.subjectroughnessen_UK
dc.titleEffects of roughness on stresses in an oxide scale formed on a superalloy substrateen_UK
dc.typeArticleen_UK

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