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There are a total of 11 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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The effect of porosity and gamma-gamma' eutectic content on the low cycle fatigue behavior of hydrogen-charged PWA-1480
Author(s): Gayda, John; Dreshfield, Robert L.; Gabb, Timothy P.
Abstract: Single crystal superalloys such as PWA 1480 are considered for turbopump blades in the main engines of the space shuttle. As fatigue resistance in a hydrogen environment is a key issue in this application, a study of the ...
NASA Center: Glenn Research Center
Publication Year: 1991
Added to NTRS: 2008-01-30
Accession Number: 93N31576; Document ID: 19930022387
Observations of directional gamma prime coarsening during engine operation
Author(s): Draper, Susan L.; Hull, David R.; Dreshfield, Robert L.
Abstract: Two alloys with negative mismatch parameters, NASAIR 100 and a modified NASAIR 100 called Alloy 3 were run as turbine blades in an experimental ground based Garret TFE731 engine for up to 200 hr. The directional coarsening ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N25459; Document ID: 19870016026; Report Number: E-3642, NAS 1.15:100105, NASA-TM-100105
Copper Alloy For High-Temperature Uses
Author(s): Dreshfield, Robert L.; Ellis, David L.; Michal, Gary
Abstract: Alloy of Cu/8Cr/4Nb (numbers indicate parts by atom percent) improved over older high-temperature copper-based alloys in that it offers enhanced high temperature strength, resistance to creep, and ductility while retaining ...
NASA Center: Glenn Research Center
Publication Year: 1994
Added to NTRS: 2005-09-30
Accession Number: 94B10443; Document ID: 19940000443; Report Number: LEW-15768
Long Time Creep Rupture of Haynes(TM) Alloy 188
Author(s): Dreshfield, Robert L.
Abstract: The creep of Haynes Alloy 188 sheet in air was studied at temperatures of 790, 845, and 900 C for times in excess of 30,000 hours as part of a program to assure that Haynes Alloy 188 could be used in critical components of a ...
NASA Center: Glenn Research Center
Publication Year: 1996
Added to NTRS: 2005-08-25
Accession Number: 96N27383; Document ID: 19960025311; Report Number: E-10163, NAS 1.15:107191, NASA-TM-107191
Post-test examination of a pool boiler receiver
Author(s): Dreshfield, Robert L.; Moore, Thomas J.; Bartolotta, Paul A.
Abstract: A subscale pool boiler test apparatus to evaluate boiling stability developed a leak after being operated with boiling NaK for 791.4 hr at temperatures from 700 to 750 C. The boiler was constructed using Inconel 625 with a ...
NASA Center: Glenn Research Center
Publication Year: 1992
Added to NTRS: 2005-08-25
Accession Number: 92N27192; Document ID: 19920017949; Report Number: DOE/NASA/33408-6, E-6978, NAS 1.15:105635, NASA-TM-105635
NDE of PWA 1480 single crystal turbine blade material
Author(s): Klima, Stanley J.; Orange, Thomas W.; Dreshfield, Robert L.
Abstract: Cantilever bending fatigue specimens were examined by fluorescent liquid penetrant and radioactive gas penetrant (Krypton) non-destructive evaluation (NDE) methods and tested. Specimens with cast, ground, or polished surface ...
NASA Center: Glenn Research Center
Publication Year: 1993
Added to NTRS: 2005-08-25
Accession Number: 93N27640; Document ID: 19930018451; Report Number: E-7351, NAS 1.15:106140, NASA-TM-106140
Effect of hydrogen exposure on a Cu-8 Cr-4 Nb alloy
Author(s): Ellis, David L.; Misra, Ajay K.; Dreshfield, Robert L.
Abstract: The advanced regeneratively cooled rocket thrust chamber may require new materials to achieve long life and improved performance. Current materials such as NARloy-Z (Cu-3 wt. percent Ag-0.5 wt. percent Zr), while highly ...
NASA Center: Glenn Research Center
Publication Year: 1993
Added to NTRS: 2005-08-25
Accession Number: 94N23556; Document ID: 19940019083; Report Number: E-8271, NAS 1.15:106429, NASA-TM-106429
Materials technology assessment for a 1050 K Stirling space engine design
Author(s): Scheuermann, Coulson M.; Dreshfield, Robert L.; Gaydosh, Darrell J.; Kiser, James D.; Mackay, Rebecca A.; Mcdaniels, David L.; Petrasek, Donald W.; Vannucci, Raymond D.; Bowles, Kenneth J.; Watson, Gordon K.
Abstract: An assessment of materials technology and proposed materials selection was made for the 1050 K (superalloy) Stirling Space Engine design. The objectives of this assessment were to evaluate previously proposed materials ...
NASA Center: Glenn Research Center
Publication Year: 1988
Added to NTRS: 2005-08-25
Accession Number: 89N11815; Document ID: 19890002444; Report Number: E-4362, NAS 1.15:101342, NASA-TM-101342
Defects in nickel-base superalloys
Author(s): Dreshfield, Robert L.
Abstract: The presence of substantial amounts of the sigma phase in Ni-base superalloys can drastically reduce the alloy's stress rupture life. No predictive system exists which is entirely successful in anticipating the formation of ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2004-11-03
Accession Number: 87A49790; Document ID: 19870062516
NDE of PWA 1480 single crystal turbine blade material
Author(s): Klima, Stanley J.; Orange, Thomas W.; Dreshfield, Robert L.
Abstract: Cantilever bending fatigue specimens were examined by fluorescent liquid penetrant and radioactive gas penetrant (Krypton) Nondestructive Evaluation (NDE) methods and tested. Specimens with cast, ground, or polished surfaces ...
NASA Center: Glenn Research Center
Publication Year: 1993
Added to NTRS: 2004-11-03
Accession Number: 95A93651; Document ID: 19950062052; Report Number: SAE PAPER 931371
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