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Cyclic hardening mechanisms in Nimonic 80AA nickel base superalloy was fatigued under constant plastic strain range control. The hardening response was investigated as a function of plastic strain range and particle size of the gamma prime phase. Hardening was found to be a function of the slip band spacing. Numerous measurements of the slip band spacing and other statistical data on the slip band structures were obtained. Interactions between intersecting slip systems were shown to influence hardening. A Petch-Hall model was found to describe best this relationship between the response stress and the slip band spacing.
Document ID
19880037263
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lerch, B. A.
(NASA Lewis Research Center Cleveland, OH, United States)
Gerold, V.
(Stuttgart, Universitaet; Max-Planck-Institut fuer Metallforschung, Federal Republic of Germany, United States)
Date Acquired
August 13, 2013
Publication Date
December 1, 1987
Publication Information
Publication: Metallurgical Transactions A - Physical Metallurgy and Materials Science
Volume: 18A
ISSN: 0360-2133
Subject Category
Metallic Materials
Accession Number
88A24490
Distribution Limits
Public
Copyright
Other

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