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Processing and Mechanical Properties of Directionally Solidified NiAl/NiAlTa AlloysPromising creep strengths were found for a directionally solidified NiAl-NiAlTa alloy when compared to other NiAl based intermetallics. The directionally solidified alloy had an off-eutectic composition that resulted in microstructures consisting of NiAl dendrites surrounded by aligned eutectic regions. The room temperature toughness of the two phase alloy was similar to that of polycrystalline NiAl even with the presence of the brittle Laves phase NiAlTa. Alloying additions that may improve the room temperature toughness by producing multiphase alloys are discussed.
Document ID
19970022133
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Johnson, D. R.
(Tennessee Univ. Knoxville, TN United States)
Oliver, B. F.
(Tennessee Univ. Knoxville, TN United States)
Noebe, R. D.
(NASA Lewis Research Center Cleveland, OH United States)
Whittenberger, J. D.
(NASA Lewis Research Center Cleveland, OH United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1994
Publication Information
Publication: Processing and Fabrication of Advanced Materials 3
Publisher: The Minerals, Metals & Materials Society
Subject Category
Metallic Materials
Report/Patent Number
NASA-CR-204682
NAS 1.26:204682
Accession Number
97N22739
Funding Number(s)
CONTRACT_GRANT: NAG3-876
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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