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Directional solidification of eutectic composites in space environment
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Yue, A. S. |
| Copyright Year | 1972 |
| Description | The Ni-Ni3Ta eutectic and a nickel-base alloy containing 30 wt pct Ta were solidified unidirectionally in an electron beam floating zone melting apparatus. It was found that the volume fraction of the Ni3Ta phase in the Ni-Ni3Ta eutectic mixture was increased from 7.6 to 36 volume pct in agreement with the theory as predicted. Tensile properties of the randomly solidified and unidirectionally solidified Ni-Ni3Ta eutectic were determined as function of solidification rate and temperature. It was found that the ultimate tensile strength decreased as both the test temperature and solidification rate increased. An elongation of 40 pct was obtained for a nickelbase alloy containing 30 wt at room temperature. This unusually large elongation was attributed to the superplastic behavior of the alloy. The critical currents versus the external fields at 2.5, 3.0, 3.5 and 4.2 deg for the unidirectionally solidified Pb-Sn eutectic were measured. The values of critical fields at zero critical currents were obtained by extrapolation. |
| File Size | 3693559 |
| Page Count | 53 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19730009800 |
| Archival Resource Key | ark:/13960/t2f81453v |
| Language | English |
| Publisher Date | 1972-12-01 |
| Access Restriction | Open |
| Subject Keyword | Materials, Metallic Creep Properties Transition Temperature Microgravity Applications Nickel Alloys Mechanical Properties Tensile Strength Tin Alloys Concentration Composition Temperature Effects Eutectics Space Commercialization Lead Alloys 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 | Technical Report |
