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A STUDY ON CRACK CONFIGURATIONS IN 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.
2017 (English)In: PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2017, VOL 6, AMER SOC MECHANICAL ENGINEERS , 2017, V006T24A005Conference paper, Published paper (Refereed)
Abstract [en]

Spallation of thermal barrier coatings subjected to thermal fatigue occurs through cracking in or close to the metal ceramic interface. To better match an experimentally observed damage progression curve with initially slow crack growth followed by rapid crack growth, a multitude of crack paths were modeled in a finite element analysis. Comparisons with experimental data enabled the most likely crack path to be identified. It was shown that the most likely failure type for the studied TBC system was crack initiation from pre-existing defects in the thermal barrier coating which propagated into the interface, leading to spallation. The results were used to fit a crack propagation model.

Place, publisher, year, edition, pages
AMER SOC MECHANICAL ENGINEERS , 2017. V006T24A005
National Category
Manufacturing, Surface and Joining Technology
Identifiers
URN: urn:nbn:se:liu:diva-142449DOI: 10.1115/GT2017-63610ISI: 000412785500056ISBN: 978-0-7918-5091-6 OAI: oai:DiVA.org:liu-142449DiVA: diva2:1153626
Conference
ASME Turbo Expo: Turbine Technical Conference and Exposition
Note

Funding Agencies|Vinnova in Sweden

Available from: 2017-10-31 Created: 2017-10-31 Last updated: 2017-10-31

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Eriksson, RobertJonnalagadda, Krisha Praveen
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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • 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