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In-situ evolution of thermal barrier coating’s mechanics due to elastic and inelastic deformation via synchrotron X-rays

Manero, Albert and Sarley, Brooke and Knipe, Kevin and Wischek, Janine and Meid, Carla and Almer, Jonathan and Okasinski, John and Bartsch, Marion and Raghavan, Seetha (2017) In-situ evolution of thermal barrier coating’s mechanics due to elastic and inelastic deformation via synchrotron X-rays. 41st International Conference on Advanced Ceramics and Composites, 22.-27. Jan. 2017, Daytona Beach, FL, USA.

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Abstract

In this study, in-situ synchrotron measurements were conducted on a thermal barrier coating system with a superalloy substrate. The use of high energy X-rays affords real-time monitoring of complex mechanical behavior; when coupled with an integrated high temperature and mechanical loading testing apparatus, variations in realistic representative service loading can be investigated for their influence on each constituent of the multi-layer system. This provides a method for identifying how changes in loading conditions across a turbine blade may play a role in the initiation of failure mechanisms and lifetime expectancy of the coating. Collecting diffraction measurements on a 2D area detector, elastic strain analysis is conducted to elucidate the influence of external thermal loading, applied mechanical loading, and internal cooling on the thermally grown oxide and ceramic zirconia topcoat. Analysis has identified the influence of these loadings on the system. Investigating the texturing and preferred orientation of the diffraction rings, further insight on the influence of plastic strain is discussed including how grains’ lattice plane rotation and subdivision during high temperature loading affect the residual strain state. Together the non-destructive methods of evaluating the multi-layer system shed light on the performance of thermal barrier coatings in operational conditions.

Item URL in elib:https://elib.dlr.de/115797/
Document Type:Conference or Workshop Item (Speech)
Title:In-situ evolution of thermal barrier coating’s mechanics due to elastic and inelastic deformation via synchrotron X-rays
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Manero, Albertuniversity of central florida, orlando, fl, usaUNSPECIFIED
Sarley, BrookeUniversity of Central Florida, Orlando, FL, USAUNSPECIFIED
Knipe, Kevinuniversity of central florida, orlando, fl, usaUNSPECIFIED
Wischek, Janinejanine.wischek (at) dlr.deUNSPECIFIED
Meid, Carlacarla.meid (at) dlr.deUNSPECIFIED
Almer, Jonathanadvanced photon source, argonne national laboratory, argonne, illinoisUNSPECIFIED
Okasinski, Johnadvanced photon source, argonne national laboratory, argonne, illinoisUNSPECIFIED
Bartsch, Marionmarion.bartsch (at) dlr.deUNSPECIFIED
Raghavan, Seethauniversity of central florida, orlando, fl, usaUNSPECIFIED
Date:23 January 2017
Refereed publication:Yes
Open Access:No
In DOAJ:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Thermal Barrier Coating, in situ testing, thermal mechanical loading, Synchrotron x-rays
Event Title:41st International Conference on Advanced Ceramics and Composites
Event Location:Daytona Beach, FL, USA
Event Type:international Conference
Event Dates:22.-27. Jan. 2017
Organizer:The American Ceramic Society
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
Institute of Materials Research > Mechanical Testing of Materials
Deposited By: Bartsch, Dr.-Ing. Marion
Deposited On:22 Nov 2017 10:35
Last Modified:23 Nov 2017 10:58

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