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Synchrotron XRD Measurements of Thermal Barrier Coatings Subjected to Loads Representing Operational Conditions of Rotating Gas Turbine Blades

Knipe, Kevin and Manero, Albert and Siddiqui, Sanna and Sofronsky, Stephen and Fouquet, Pascal and Raghavan, Seetha and Meid, Carla and Wischek, Janine and Bartsch, Marion and Okasinski, John and Almer, Jonathan and Karlsson, Anette M. (2014) Synchrotron XRD Measurements of Thermal Barrier Coatings Subjected to Loads Representing Operational Conditions of Rotating Gas Turbine Blades. In: 52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014. American Institute of Aeronautics and Astronautics Inc.. 52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014, 13.-17. Jan. 2014, National Harbor, Maryland, USA. ISBN 978-162410256-1

Full text not available from this repository.

Official URL: http://arc.aiaa.org/doi/pdf/10.2514/6.2014-1157

Abstract

High-energy synchrotron x-rays were used in this work to monitor the internal strain behavior of Thermal Barrier Coatings (TBC) under thermal gradient and mechanical loading. Tubular specimens made from Nickel based super alloy with a TBC-system applied onto the outer surface by Electron Beam Physical Vapor Deposition were used to allow for cooling of the internal surface of the substrate while heating the external surface during thermal mechanical cycling. The coating system consisted of a Yittria Stabilized Zirconia (YSZ) top coat and a MCrAlY bond coat. Through transmission along with a 2D detector allowed for the 2D strain monitoring of each layer during high temperature operation. Monitoring the micro-strain of each phase within the layers provides insight into their high temperature behavior which can be used to further develop predictive models including evolution of elastic strain as well as creep and plasticity. Obtained results have shown a large variation in strains during ramp up of in-phase thermal and/or mechanical load with a significant tensile strain mismatch between the two prominent phases of the bond coat. The YSZ has displayed residual compressive strains at the bond coat/YSZ interface and maintained some compressive residual strain during high temperature holds. These results give valuable insight into the mechanics of these complex systems under various high temperature conditions.

Item URL in elib:https://elib.dlr.de/89506/
Document Type:Conference or Workshop Item (Speech)
Title:Synchrotron XRD Measurements of Thermal Barrier Coatings Subjected to Loads Representing Operational Conditions of Rotating Gas Turbine Blades
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Knipe, KevinUniversity of Central Florida, Orlando, FL, USAUNSPECIFIED
Manero, AlbertUniversity of Central Florida, Orlando, FL, USAUNSPECIFIED
Siddiqui, SannaUniversity of Central Florida, Orlando, FL, USAUNSPECIFIED
Sofronsky, StephenUniversity of Central Florida, Orlando, FL, USAUNSPECIFIED
Fouquet, PascalUniversity of Central Florida, Orlando, FL, USAUNSPECIFIED
Raghavan, SeethaUniversity of Central Florida, Orlando, FL, USAUNSPECIFIED
Meid, Carlacarla.meid (at) dlr.deUNSPECIFIED
Wischek, Janinejanine.wischek (at) dlr.deUNSPECIFIED
Bartsch, Marionmarion.bartsch (at) dlr.deUNSPECIFIED
Okasinski, JohnAdvanced Photon Source, Argonne National Laboratory, Argonne, IllinoisUNSPECIFIED
Almer, JonathanAdvanced Photon Source, Argonne National Laboratory, Argonne, IllinoisUNSPECIFIED
Karlsson, Anette M.Cleveland State University, Ohio, USAUNSPECIFIED
Date:January 2014
Journal or Publication Title:52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014
Refereed publication:Yes
Open Access:No
In DOAJ:No
In SCOPUS:No
In ISI Web of Science:No
Publisher:American Institute of Aeronautics and Astronautics Inc.
ISBN:978-162410256-1
Status:Published
Keywords:Thermal Barrier Coating, Synchrotron diffraction, in-situ testing, thermal gradient, mechanical fatigue
Event Title:52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014
Event Location:National Harbor, Maryland, USA
Event Type:international Conference
Event Dates:13.-17. Jan. 2014
Organizer:American Institute of Aeronautics and Astronautics - AIAA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation methods
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Experimental and Numerical Methods
Deposited By: Bartsch, Dr.-Ing. Marion
Deposited On:10 Jul 2014 09:27
Last Modified:16 Jul 2014 14:34

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