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Bending Fatigue of Thermal Barrier Coatings
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.
2017 (English)In: Journal of engineering for gas turbines and power, ISSN 0742-4795, E-ISSN 1528-8919, Vol. 139, no 12, 122101-1-122101-6 p.Article in journal (Refereed) Published
Abstract [en]

Thermal barrier coatings (TBCs) are ceramic coatings used in gas turbines to lower the base metal temperature. During operation, the TBC may fail through, for example, fatigue. In this study, a TBC system deposited on a Ni-base alloy was tested in tensile bending fatigue. The TBC system was tested as-sprayed and oxidized, and two load levels were used. After interrupting the tests, at 10,000–50,000 cycles, the TBC tested at the lower load had extensive delamination damage, whereas the TBC tested at the higher load was relatively undamaged. At the higher load, the TBC formed vertical cracks which relieved the stresses in the TBC and retarded delamination damage. A finite element (FE) analysis was used to establish a likely vertical crack configuration (spacing and depth), and it could be confirmed that the corresponding stress drop in the TBC should prohibit delamination damage at the higher load.

Place, publisher, year, edition, pages
ASME Press, 2017. Vol. 139, no 12, 122101-1-122101-6 p.
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:liu:diva-142274DOI: 10.1115/1.4037587ISI: 000415791400010Scopus ID: 2-s2.0-85029559590OAI: oai:DiVA.org:liu-142274DiVA: diva2:1152252
Available from: 2017-10-24 Created: 2017-10-24 Last updated: 2017-12-12Bibliographically approved

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Eriksson, RobertJonnalagadda, Krisha Praveen

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Eriksson, RobertChen, ZheJonnalagadda, Krisha Praveen
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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf