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There are a total of 99 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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Slow plastic deformation of extruded NiAl-10TiB2 particulate composites at 1200 and 1300 K
Author(s): Whittenberger, J. D.; Kumar, S.; Mannan, S. K.; Viswanadham, R. K.
Abstract: A dispersion of 1-micron TiB2 particles in the B2 crystal structure NiAl intermetallic can effectively increase its elevated temperature strength, in association with increasing deformation resistance with TiB2 volume ...
NASA Center: Glenn Research Center
Publication Year: 1990
Added to NTRS: 2004-11-03
Accession Number: 90A46133; Document ID: 19900059078
Effect of multiple strain-anneal cycles on the 1000 C creep behaviour of gamma/gamma prime-alpha
Author(s): Whittenberger, J. D.; Buzek, B. C.; Wirth, G.
Abstract: Various multiple strain-anneal cycles (1000 C) were imposed on specimens of the directionally solidified eutectic (DSE) alloy gamma/gamma prime-alpha to identify thermomechanical processing methods (TMP) which would improve ...
NASA Center: Glenn Research Center
Publication Year: 1986
Added to NTRS: 2004-11-03
Accession Number: 86A30610; Document ID: 19860045872
1000 to 1300 K slow plastic compression properties of Al-deficient NiAl
Author(s): Whittenberger, J. D.; Kumar, K. S.; Mannan, S. K.
Abstract: Nickel aluminides containing 37, 38.5 and 40 at. pct Al have been fabricated by XD synthesis and hot pressing. Such materials were compression tested in air under constant velocity conditions between 1000 and 1300 K. ...
NASA Center: Glenn Research Center
Publication Year: 1991
Added to NTRS: 2004-11-03
Accession Number: 91A36214; Document ID: 19910051591
Influence of grain size on the creep behavior of HfC-dispersed NiAl
Author(s): Whittenberger, J. D.; Ray, Ranjan; Jha, Sunil C.
Abstract: Rapid solidification technology has been utilized to produce a NiAl-4(wt pct)HfC composite containing about 0.3 vol pct HfC as dispersed 50 nm particles. Study of the 1300 K compressive creep properties demonstrated that the ...
NASA Center: Glenn Research Center
Publication Year: 1992
Added to NTRS: 2004-11-03
Accession Number: 93A17674; Document ID: 19930033677
Deformation of as-cast LiF-22 mol pct CaF2 hypereutectic salt between 500 and 1015 K
Author(s): Raj, S. V.; Whittenberger, J. D.
Abstract: Results are presented on compression tests conducted on as-cast LiF-22 mol pct CaF2 hypereutectic specimens at nominal strain rates between 1.8 x 10 to the -6th/sec and 0.25/sec over the temperature range 500-1015 K. In all ...
NASA Center: Glenn Research Center
Publication Year: 1990
Added to NTRS: 2004-11-03
Accession Number: 90A49086; Document ID: 19900062031
Cyclic oxidation resistance of a reaction milled NiAl-AlN composite
Author(s): Lowell, Carl E.; Barrett, Charles A.; Whittenberger, J. D.
Abstract: Based upon recent mechanical property tests a NiAl-AlN composite produced by cryomilling has very attractive high temperature strength. This paper focuses on the oxidation resistance of the NiAl-AlN composite at 1473 and ...
NASA Center: Glenn Research Center
Publication Year: 1990
Added to NTRS: 2004-11-03
Accession Number: 92A46871; Document ID: 19920064247
Mechanical properties of Haynes Alloy 188 after exposure to LiF-22CaF2, air, and vacuum at 1093 K for periods up to 10,000 hours
Author(s): Whittenberger, J. D.
Abstract: As part of a program to provide reassurance that the cobalt-base superalloy Haynes Alloy 188 can adequately contain a LiF-CaF2 eutectic thermal energy storage salt, 4900- and 10,000-hr exposures of Haynes Alloy 188 to ...
NASA Center: Glenn Research Center
Publication Year: 1992
Added to NTRS: 2004-11-03
Accession Number: 93A36586; Document ID: 19930052589
Estimated heats of fusion of fluoride salt mixtures suitable for thermal energy storage applications
Author(s): Misra, A. K.; Whittenberger, J. D.
Abstract: The heats of fusion of several fluoride salt mixtures with melting points greater than 973 K were estimated from a coupled analysis of the available thermodynamic data and phase diagrams. Simple binary eutectic systems with ...
NASA Center: Glenn Research Center
Publication Year: 1986
Added to NTRS: 2004-11-03
Accession Number: 86N31982; Document ID: 19860022510; Report Number: E-3057, NAS 1.15:87320, NASA-TM-87320
Slow plastic strain rate compressive flow in binary CoAl intermetallics
Author(s): Whittenberger, J. D.
Abstract: Constant-velocity elevated temperature compression tests have been conducted on a series of binary CoAl intermetallics produced by hot extrusion of blended prealloyed powders. The as-extruded materials were polycrystalline, ...
NASA Center: Glenn Research Center
Publication Year: 1985
Added to NTRS: 2004-11-03
Accession Number: 86A11478; Document ID: 19860026740
The effect of a coating on the thermo-oxidative stability of Celion 6000 graphite fiber/PMR 15 polyimide composites
Author(s): Hurwitz, F. I.; Whittenberger, J. D.
Abstract: The thermooxidative stability in air at 316 C of unidirectional, uncoated and aluminum-coated Celion 6000 graphite fiber/PMR 15 polyimide composites has been determined for exposure times up to nominally 2000 h. Comparison ...
NASA Center: Glenn Research Center
Publication Year: 1983
Added to NTRS: 2004-11-03
Accession Number: 84A21844; Document ID: 19840039057
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