Fatigue behavior of a thermal barrier coated superalloy at $800 ^0 C$

Ray, AK and Dwarakadasa, ES and Das, DK and Ranganath, VR and Goswam, B and Sahu, JK and Whittenberger, JD (2007) Fatigue behavior of a thermal barrier coated superalloy at $800 ^0 C$. In: Materials Science and Engineering: A, 448 (1-2). pp. 294-298.

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Abstract

Fatigue testing of thermal barrier coated (TBC), bond coated only and bare Superni C263 superalloy was conducted at $800 ^0 C$ in air. Results reveal that the endurance limits for the TBC and bond coated substrate was substantially higher than that of the base alloy, while the opposite was found for high stress, low cyclic life times. It appears that the increase in endurance limit for the TBC and bond coated superalloy is due to load shifting to the bond coat, and the premature failure for these two materials is possibly due to high stress crack imitation/growth in the TBC/bond coat layers.

Item Type:	Journal Article
Publication:	Materials Science and Engineering: A
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Keywords:	Thermal barrier coating (TBC);Fatigue;Superalloy;Bond coat;Substrate;Endurance;Stress;Crack growth
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	02 Jun 2008
Last Modified:	19 Sep 2010 04:45
URI:	http://eprints.iisc.ac.in/id/eprint/14107

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