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Hernandez, Mercedes T. and Karlsson, Anette M. and Bartsch, Marion (2009) On TGO creep and the initiation of a class of fatigue cracks in thermal barrier coatings. Surface and Coatings Technology, 203, pp. 3549-3558. Elsevier. doi: 10.1016/j.surfcoat.2009.05.018. ISSN 0257-8972.
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Abstract
The initiation of a class of fatigue cracks observed in thermal barrier coatings (TBCs) subjected to thermal gradient mechanical fatigue testing is investigated. The coating system is based on a NiCoCrAlY bond coat and a partially yttria stabilized zirconia top coat. To explain the development of the cracks of interest, the thermo-mechanical response of the bond coat and the thermally grown oxide (TGO) is examined and quantified through finite element analyses. The models include non-linear and time-dependent behavior such as creep, TGO growth stress, and thermo-mechanical cyclic loading. The simulations suggest that stressredistribution due to creep can lead to tensile stresses in the TGO during TGMF testing that are large enough to initiate the cracks investigated.
| Item URL in elib: | https://elib.dlr.de/61203/ | ||||||||||||||||
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| Document Type: | Article | ||||||||||||||||
| Title: | On TGO creep and the initiation of a class of fatigue cracks in thermal barrier coatings | ||||||||||||||||
| Authors: |
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| Date: | 2009 | ||||||||||||||||
| Journal or Publication Title: | Surface and Coatings Technology | ||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||
| Open Access: | No | ||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||
| In SCOPUS: | Yes | ||||||||||||||||
| In ISI Web of Science: | Yes | ||||||||||||||||
| Volume: | 203 | ||||||||||||||||
| DOI: | 10.1016/j.surfcoat.2009.05.018 | ||||||||||||||||
| Page Range: | pp. 3549-3558 | ||||||||||||||||
| Publisher: | Elsevier | ||||||||||||||||
| ISSN: | 0257-8972 | ||||||||||||||||
| Status: | Published | ||||||||||||||||
| Keywords: | Thermal barrier coatings Thermally grown oxide Creep Fatigue cracks Finite element analysis | ||||||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||
| HGF - Program: | Aeronautics | ||||||||||||||||
| HGF - Program Themes: | L VU - Air Traffic and Environment (old) | ||||||||||||||||
| DLR - Research area: | Aeronautics | ||||||||||||||||
| DLR - Program: | L VU - Air Traffic and Environment | ||||||||||||||||
| DLR - Research theme (Project): | L - Low-Emission Air Traffic (old) | ||||||||||||||||
| Location: | Köln-Porz | ||||||||||||||||
| Institutes and Institutions: | Institute of Materials Research > Experimental and Numerical Methods | ||||||||||||||||
| Deposited By: | Bartsch, Dr.-Ing. Marion | ||||||||||||||||
| Deposited On: | 27 Nov 2009 10:56 | ||||||||||||||||
| Last Modified: | 28 Jul 2022 16:42 |
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