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Directionally solidified eutectic alloy gamma-betaA pseudobinary eutectic alloy composition was determined by a previously developed bleed-out technique. The directionally solidified eutectic alloy with a composition of Ni-37.4Fe-10.0Cr-9.6Al (in wt%) had tensile strengths decreasing from 1,090 MPa at room temperature to 54 MPa at 1,100 C. The low density, excellent microstructural stability, and oxidation resistance of the alloy during thermal cycling suggest that it might have applicability as a gas turbine vane alloy while its relatively low high temperature strength precludes its use as a blade alloy. A zirconium addition increased the 750 C strength, and a tungsten addition was ineffective. The gamma=beta eutectic alloys appeared to obey a normal freezing relation.
Document ID
19770009204
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Tewari, S. N.
(Natl. Res. Council)
Date Acquired
September 3, 2013
Publication Date
January 1, 1977
Subject Category
Metallic Materials
Report/Patent Number
E-8845
NASA-TN-D-8355
Meeting Information
Meeting: Annual Meeting of the Am. Inst. of Mining, Metallurgical, and Petroleum Engineers
Location: Las Vegas, NV
Country: United States
Start Date: February 22, 1976
End Date: February 26, 1976
Accession Number
77N16147
Funding Number(s)
PROJECT: RTOP 505-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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