| タイトル | Phase Stability of a Powder Metallurgy Disk Superalloy |
| 本文（外部サイト） | http://hdl.handle.net/2060/20070007328 |
| 著者（英） | Telesman, Jack; Gabb, Timothy P.; Gang, Anita; Kantzos, P.; Gayda, John |
| 著者所属（英） | NASA Glenn Research Center |
| 発行日 | 2006-10-18 |
| 言語 | eng |
| 内容記述 | Advanced powder metallurgy superalloy disks in aerospace turbine engines now entering service can be exposed to temperatures approaching 700 C, higher than those previously encountered. They also have higher levels of refractory elements, which can increase mechanical properties at these temperatures but can also encourage phase instabilities during service. Microstructural changes including precipitation of topological close pack phase precipitation and coarsening of existing gamma' precipitates can be slow at these temperatures, yet potentially significant for anticipated disk service times exceeding 1,000 h. The ability to quantify and predict such potential phase instabilities and degradation of capabilities is needed to insure structural integrity and air worthiness of propulsion systems over the full life cycle. A prototypical advanced disk superalloy was subjected to high temperature exposures, and then evaluated. Microstructural changes and corresponding changes in mechanical properties were quantified. The results will be compared to predictions of microstructure modeling software. |
| NASA分類 | Metals and Metallic Materials |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/259001 |
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