Cyclic Creep And Fatigue Of Td Nicr Thoria Dispersion Strengthened Nickel Chromium Td Ni And Nicr Sheet At 1200 C
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Cyclic Creep and Fatigue of TD NiCr thoria dispersion strengthened Nickel chromium TD Ni and NiCr Sheet at 1200 C
Author | : Marvin H. Hirschberg |
Publsiher | : Unknown |
Total Pages | : 36 |
Release | : 1972 |
Genre | : Space shuttles |
ISBN | : UIUC:30112106882894 |
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The resistance of thin TD-NiCr sheet to cyclic deformation was compared with that of TD-Ni and a conventional nickel-chromium alloy. Strains were determined by a calibration technique which combines room-temperature strain gage and deflection measurements with high-temperature deflection measurements. Analyses of the cyclic tests using measured tensile and creep-rupture data indicated that the TD-NiCr and NiCr alloy specimens failed by a cyclic creep mechanism. The TD-Ni specimens, on the other hand, failed by a fatigue mechanism.
NASA Technical Note
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 482 |
Release | : 1972 |
Genre | : Electronic Book |
ISBN | : MINN:319510008463900 |
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Scientific and Technical Aerospace Reports
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 970 |
Release | : 1975 |
Genre | : Aeronautics |
ISBN | : UIUC:30112057085133 |
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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Monthly Catalogue United States Public Documents
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 978 |
Release | : 1972 |
Genre | : Government publications |
ISBN | : UOM:39015022681731 |
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Monthly Catalog of United States Government Publications
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 1386 |
Release | : 2024 |
Genre | : Government publications |
ISBN | : WISC:89117116400 |
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Monthly Catalog of United States Government Publications Cumulative Index
Author | : United States. Superintendent of Documents |
Publsiher | : Unknown |
Total Pages | : 1466 |
Release | : 1976 |
Genre | : United States |
ISBN | : STANFORD:36105019598577 |
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Fatigue at Elevated Temperatures
Author | : Anonim |
Publsiher | : ASTM International |
Total Pages | : 804 |
Release | : 1973 |
Genre | : Metals |
ISBN | : 9182736450XXX |
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Diffusional Creep and Creep Degradation in the Dispersion strengthened Alloy TD NiCr
Author | : John Daniel Whittenberger |
Publsiher | : Unknown |
Total Pages | : 36 |
Release | : 1972 |
Genre | : Nickel alloys |
ISBN | : UIUC:30112106641761 |
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Dispersoid-free regions were observed in TD-NiCr (Ni-20Cr-2ThO2) after slow strain rate testing in air from 1145 to 1590 K. Formation of the dispersoid-free regions appears to be the result of diffusional creep. The net effect of this creep is the degradation of TD-NiCr to a duplex microstructure. Degradation is further enhanced by the formation of voids and integranular oxidation in the thoria-free regions. These regions apparently provided sites for void formation and oxide growth since the strength and oxidation resistance of Ni-20Cr is much less than Ni-20Cr-2ThO2. This localized oxidation does not appear to reduce the static load bearing capacity of TD-NiCr since long stress rupture lives were observed even with heavily oxidized microstructures. But this oxidation does significantly reduce the ductility and impact resistance of the material. Dispersoid-free bands and voids were also observed for two other dispersion strengthened alloys, TD-NiCrAl and IN-853. Thus, it appears that diffusional creep is charactertistic of dispersion-strengthened alloys and can play a major role in the creep degradation of these materials.