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Lattice parameter variations during aging in nickel-base superalloysThe importance of the state of coherency on measurements of gamma/gamma-prime lattice mismatch has been experimentally demonstrated during aging at 1000 C of specimens of an alloy with composition Ni-(8.6)Cr-(5.3)Al-(10.1)Co-(11.7)W-(1.2)Ti-(0.7)Mo (wt pct). Lattice parameter measurements are given as a function of aging time, and the corresponding sample microstructures are presented. The results show that changes of the two phases during aging did not influence the lattice parameter measurements, indicating that aging specimens to produce a semicoherent gamma/gamma-prime structure provides a good approximation of the true, unconstrained lattice mismatch.
Document ID
19880064091
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1016/S0036-9748(88)80012-7
Authors
Nathal, M. V. (NASA Lewis Research Center Cleveland, OH, United States)
Mackay, R. A. (NASA Lewis Research Center Cleveland, OH, United States)
Garlick, R. G. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 13, 2013
Publication Date
September 1, 1988
Publication Information
Publication: Scripta Metallurgica
Volume: 22
ISSN: 0036-9748
Subject Category
Metallic Materials
Accession Number
88A51318
Distribution Limits
Public
Copyright
Other

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