| タイトル | Vacuum thermal-mechanical fatigue testing of two iron base high temperature alloys |
| 本文（外部サイト） | http://hdl.handle.net/2060/19740008102 |
| 著者（英） | Sheffler, K. D. |
| 著者所属（英） | TRW Equipment Labs. |
| 発行日 | 1974-01-31 |
| 言語 | eng |
| 内容記述 | Ultrahigh vacuum elevated temperature low cycle fatigue and thermal fatigue tests of 304 stainless steel and A-286 alloy have shown significant effects of frequency and combined temperature-strain cycling on fatigue life. At constant temperature, the cyclic life of both alloys was lower at lower frequencies. Combined temperature-strain cycling reduced fatigue life with respect to isothermal life at the maximum temperature of the thermal cycle. Life reductions with in-phase thermal cycling (tension at high temperature, compression at low temperature) were attributed to grain boundary cavitation caused by unreversed tensile grain boundary sliding. The proposed mechanism for out-of-phase cavity generation involved accumulation of unreversed compressive grain boundary displacements which could not be geometrically accomodated by intragranular deformation in the low-ductility A-286 alloy. |
| NASA分類 | MATERIALS, METALLIC |
| レポートNO | 74N16215
TRW-ER-7697
NASA-CR-134524
REPT-3 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/195977 |
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