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The effect of thermal cycling to 1100 degree c on the alpha (mo) phase in directionally solidified gamma/gamma prime-alpha alloys
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Harf, F. H. |
| Copyright Year | 1981 |
| Description | In gamma/gamma prime - alpha eutectic alloys (Ni-Mo-Al), the resistance of the alpha phase to morphological changes during thermal cycling was found to be dependent on the structure formed during directional solidification. Fine, smooth alpha fibers survived up to 1000 five minute cycles to 1100 C with minor microstructural contour changes, while coarser and irregularly shaped alpha fibers tended to spheroidize. A mechanism to explain this phenomenon is proposed. It is suggested that on heating to 1100 C, the alpha phase is likely to undergo morphological changes, until differential thermal expansion creates a stress free interface between the alpha phase and the gamma/gamma prime matrix. |
| File Size | 5833694 |
| Page Count | 18 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810009640 |
| Archival Resource Key | ark:/13960/t3sv2df1d |
| Language | English |
| Publisher Date | 1981-01-01 |
| Access Restriction | Open |
| Subject Keyword | Metallic Materials Refractory Metals Aluminum Eutectics Alloys Binary Systems Materials Thermal Cycling Tests Nickel Eutectic Alloys Binary Mixtures Molybdenum Solid Phases Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
