| タイトル | The effects of temperature gradient and growth rate on the morphology and fatigue properties of MAR-M246(Hf) |
| 本文（外部サイト） | http://hdl.handle.net/2060/19890020157 |
| 著者（英） | Alter, W. S.; Parr, R. A.; Hamilton, W. D.; Schmidt, D. D. |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 1989-08-01 |
| 言語 | eng |
| 内容記述 | MAR-M246(Hf) is a nickel based superalloy used in the turbopump blades of the Space Shuttle main engines. The effects are considered of temperature gradient (G) and growth rate (R) on the microstructure and fatigue properties of this superalloy. The primary dendrite arm spacings were found to be inversely proportional to both temperature gradient and growth rate. Carbide and gamma - gamma prime morphology trends were related to G/R ratios. Weibull analysis of fatigue results shows the characteristic life to be larger by a factor of 10 for the low gradient/fast rate pairing of G and R, while the reliability (beta) was lower. |
| NASA分類 | METALLIC MATERIALS |
| レポートNO | 89N29528
NASA-TM-100374
NAS 1.15:100374 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/140612 |
