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Damage behavior of Thermal Barrier Coatings for gas turbine blades

Bartsch, Marion and Hernandez, Mercedes T. and Karlsson, Anette (2009) Damage behavior of Thermal Barrier Coatings for gas turbine blades. Seminar on Materials Science , 5. Juni 2009, Nagaoka, Japan.

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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 stress-redistribution 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/61356/
Document Type:Conference or Workshop Item (Speech)
Title:Damage behavior of Thermal Barrier Coatings for gas turbine blades
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Hernandez, Mercedes T.University Delaware, U.S.A.UNSPECIFIEDUNSPECIFIED
Karlsson, AnetteUniversity Delaware, U.S.A.UNSPECIFIEDUNSPECIFIED
Date:5 June 2009
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Thermal Barrier Coating System, EB-PVD, fatigue cracks
Event Title:Seminar on Materials Science
Event Location:Nagaoka, Japan
Event Type:Other
Event Dates:5. Juni 2009
Organizer:Prof. Masakazu Okazaki, Nagaoka University of Technology
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
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:03 Dec 2009 15:22
Last Modified:03 Dec 2009 15:22

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