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Stress rupture and creep behavior of a low pressure plasma-sprayed NiCoCrAlY coating alloy in air and vacuumThe creep behavior of a NiCoCrAlY coating alloy in air and vacuum at 660 and 850 C is studied. The microstructure of the coating alloy is described. Analysis of the creep curves reveal that the secondary creep rates, the transition from secondary to tertiary creep, and the strain-to-failure are affected by the environment, preexposure, stress, and temperature. It is observed that the rupture lives of the NiCoCrAlY alloy at 660 and 850 C are greater in air than in vacuum. Several mechanisms that may explain the lack of crack growth from surface-connected pores during tests in air are proposed.
Document ID
19870056122
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hebsur, M. G.
(NASA Lewis Research Center Cleveland, OH, United States)
Miner, R. V.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Publication Information
Publication: Thin Solid Films
Volume: 147
ISSN: 0040-6090
Subject Category
Metallic Materials
Accession Number
87A43396
Distribution Limits
Public
Copyright
Other

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