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High temperature isothermal and cyclic oxidation behavior of a single crystal Ni base superalloyHigh-temperature oxidation behavior of a Ni-base superalloy, PWA1480, developed for use as single-crystal blades and vanes in advanced gas turbines, has been assessed. Isothermal and cyclic oxidation tests up to 200 hours were conducted at 1323, 1410, and 1473 K. The alloy was evaluated as to sample weight change, type of scale formed, type and amount of spall, and microstructural changes. The oxidation attack was more severe in cyclic as compared with isothermal oxidation. Also, enormous growth of the gamma-prime precipitate was observed at 1423 K during cyclic oxidation.
Document ID
19890025254
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
March 1, 1987
Publication Information
Publication: Journal of Materials for Energy Systems
Volume: 8
ISSN: 0162-9719
Subject Category
Metallic Materials
Report/Patent Number
ISSN: 0162-9719
Accession Number
89A12625
Distribution Limits
Public
Copyright
Other

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