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The High Temperature Fatigue Behavior of Inconel-738LC Material Deposited Thermal Barrier Coating

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Abstract:

This work investigated the thermal fatigue behavior of Inconel-738LC material deposited thermal barrier coating by Vacuum Plasma Spray(VPS). The Inconel-738LC material which is widely used as a turbine parts is a CoNi-based superalloy with CoNiCrAlY bond coating and ZrO2-8wt%Y2O3 ceramic top coating. The microstructure of coating layer was analyzed by SEM/EDS and XRD. Thermal fatigue tests were performed using compact tension specimens at 550°C, 750°C, 950°C with the load frequency of 10Hz. The fatigue crack growth behavior was characterized depending on number of cycles. The crack growth rate was found to be greater at lower frequency and higher temperature.

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Periodical:

Advanced Materials Research (Volumes 264-265)

Pages:

1409-1414

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.264-265.1409

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Online since:

June 2011

Authors:

Jung Hong Park, M.S. Ku, Jeong Suk Kim, K.H. Lee, Y.S. Song, Myung Chang Kang

Keywords:

Fatigue Test, Thermal Barrier Coating (TBC), Thermal Grown Oxide (TGO), Vacuum Plasma Spray (VPS)

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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