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On TGO creep and the initiation of a class of fatigue cracks in thermal barrier coatings

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. ISBN 10.1016/j.surfcoat.2009.05.018

Full text not available from this repository.

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/
Document Type:Article
Title:On TGO creep and the initiation of a class of fatigue cracks in thermal barrier coatings
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hernandez, Mercedes T.University Delaware, DE, U.S.A.UNSPECIFIED
Karlsson, Anette M. University Delaware, DE, U.S.A.UNSPECIFIED
Bartsch, MarionMarion.Bartsch (at) dlr.deUNSPECIFIED
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
Page Range:pp. 3549-3558
Publisher:Elsevier
ISBN:10.1016/j.surfcoat.2009.05.018
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:10 Apr 2019 11:55

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