| タイトル | Replacing critical and strategic refractory metal elements in nickel-base superalloys |
| 本文（外部サイト） | http://hdl.handle.net/2060/19840005196 |
| 著者（英） | Stephens, J. R.; Dreshfield, R. L.; Nathal, M. V. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1983-12-01 |
| 言語 | eng |
| 内容記述 | Because of the import status and essential nature of their use, cobalt, chromium, tantalum, and niobium were identified as strategic and critical in the aerospace industry. NASA's Conservation of Strategic Aerospace Materials (COSAM) program aims to reduce the need for strategic materials used in gas turbine engines. Technological thrusts in two major areas are under way to meet the primary objective of conserving the use of strategic materials in nickelbase superalloys. These thrusts consist of strategic element substitution and alternative material identification. The program emphasizes cooperative research teams involving NASA Lewis Research Center, universities, and industry. The adoption of refractory metals in nickel-base superalloys is summarized including their roles in mechanical strengthening and environmental resistance; current research activities under way in the COSAM Program are presented as well as research findings to date. |
| NASA分類 | METALLIC MATERIALS |
| レポートNO | 84N13264
NASA-TM-83528
NAS 1.15:83528
E-1894 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/160940 |
