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Creep and tensile properties of several oxide-dispersion-strengthened nickel-base alloys at 1365 k
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Wittenberger, J. D. |
| Copyright Year | 1977 |
| Description | The tensile properties at room temperature and at 1365 K and the tensile creep properties at low strain rates at 1365 K were measured for several oxide-dispersion-strengthened (ODS) alloys. The alloys examined included ODS Ni, ODS Ni-20Cr, and ODS Ni-16Cr-Al. Metallography of creep tested, large grain size ODS alloys indicated that creep of these alloys is an inhomogeneous process. All alloys appear to possess a threshold stress for creep. This threshold stress is believed to be associated with diffusional creep in the large grain size ODS alloys and normal dislocation motion in perfect single crystal (without transverse low angle boundaries) ODS alloys. Threshold stresses for large grain size ODS Ni-20Cr and Ni-16Cr-Al type alloys are dependent on the grain aspect ratio. Because of the deleterious effect of prior creep on room temperature mechanical properties of large grain size ODS alloys, it is speculated that the threshold stress may be the design limiting creep strength property. |
| File Size | 1353243 |
| Page Count | 25 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19770017308 |
| Archival Resource Key | ark:/13960/t3712vg8c |
| Language | English |
| Publisher Date | 1977-05-01 |
| Access Restriction | Open |
| Subject Keyword | Metallic Materials Creep Properties Nickel Alloys Crystal Dislocations Metallography Oxides Tables Data Oxidation Resistance Heat Resistant Alloys Fatigue Materials Microstructure Graphs Charts Tensile Properties Oxide Dispersion Strengthening Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
