| タイトル | Low strain, long life creep fatigue of AF2-1DA and INCO 718 |
| 本文（外部サイト） | http://hdl.handle.net/2060/19840002201 |
| 著者（英） | Thakker, A. B.; Cowles, B. A. |
| 著者所属（英） | Pratt and Whitney Aircraft Group |
| 発行日 | 1983-04-01 |
| 言語 | eng |
| 内容記述 | Two aircraft turbine disk alloys, GATORIZED AF2-DA and INCO 718 were evaluated for their low strain long life creep-fatigue behavior. Static (tensile and creep rupture) and cyclic properties of both alloys were characterized. The cntrolled strain LCF tests were conducted at 760 C (1400 F) and 649 C (1200 F) for AF2-1DA and INCO 718, respectively. Hold times were varied for tensile, compressive and tensile/compressive strain dwell (relaxation) tests. Stress (creep) hold behavior of AF2-1DA was also evaluated. Generally, INCO 718 exhibited more pronounced reduction in cyclic life due to hold than AF2-1DA. The percent reduction in life for both alloys for strain dwell tests was greater at low strain ranges (longer life regime). Changing hold time from 0 to 0.5, 2.0 and 15.0 min. resulted in corresponding reductions in life. The continuous cycle and cyclic/dwell initiation failure mechanism was predominantly transgranular for AF2-1DA and intergranular for INCO 718. |
| NASA分類 | METALLIC MATERIALS |
| レポートNO | 84N10268
NAS 1.26:167989
FR-15652
NASA-CR-167989 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/161252 |
