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Morphological instabilities of metallic oxidation protection coatings for gas turbine blades

Bartsch, Marion and Baufeld, Bernd and Shi, Jun and Karlsson, Anette M. (2006) Morphological instabilities of metallic oxidation protection coatings for gas turbine blades. In: ODAS 2006 - 7th ONERA-DLR Aerospace Symposium, [9.5]. ODAS 2006 - 7th ONERA - DLR Aerospace Symposium, [2006-10-04 - 2006-10-06], Toulouse, France.

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Abstract

Turbine blades in aircraft engines are usually protected with a metallic oxidation protective coating. Morphological instabilities such as rumpling and wrinkling on the surfaces of the metallic coatings have recently received significant attention since it can be directly linked to failures of the coated component. The evolution of such morphological instabilities is governed by material parameters, service conditions, and time dependent changes of the material system, such as oxidation. With a newly developed test facility, which can simulate the low cycle fatigue load of turbine blades very closely to the service conditions, we have performed thermal and thermo-mechanical fatigue tests on coated tubular specimens resulting in different features of surface rumpling: (i) Thermal cycling with no thermal gradient over the wall thickness of the coated specimen gives no surface rumpling; (ii) Thermal cycling with such a thermal gradient results in random distribution of rumples; and (iii) Thermal cycling with a thermal gradient and superposed tensile mechanical loading results in rumples aligned with the axis of the cylindrical test specimen. The experiments have been modeled and simulated by finite element methods. The numerical results capture the experimentally observed behavior and elucidate the thermo-mechanical response of the coated system.

Item URL in elib:https://elib.dlr.de/45989/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Morphological instabilities of metallic oxidation protection coatings for gas turbine blades
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bartsch, MarionUNSPECIFIEDUNSPECIFIED
Baufeld, BerndKatholieke Universiteit Leuven, BelgiumUNSPECIFIED
Shi, JunUniversity of Delaware, DE, USAUNSPECIFIED
Karlsson, Anette M.University of Delaware, DE, USAUNSPECIFIED
Date:6 October 2006
Journal or Publication Title:ODAS 2006 - 7th ONERA-DLR Aerospace Symposium
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:[9.5]
Editors:
EditorsEmail
ONERA und DLR, UNSPECIFIED
Status:Published
Keywords:turbine blade, oxidation protection layer, rumpling, thermal gradient
Event Title:ODAS 2006 - 7th ONERA - DLR Aerospace Symposium
Event Location:Toulouse, France
Event Type:international Conference
Event Dates:[2006-10-04 - 2006-10-06]
Organizer:ONERA und DLR
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation Methods (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research
Deposited By: Bartsch, Dr.-Ing. Marion
Deposited On:08 Dec 2006
Last Modified:27 Apr 2009 13:18

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