| タイトル | Microstructure: Property correlation |
| 本文（外部サイト） | http://hdl.handle.net/2060/19900019564 |
| 著者（英） | Jayaraman, N. |
| 著者所属（英） | Cincinnati Univ. |
| 発行日 | 1990-10-01 |
| 言語 | eng |
| 内容記述 | Strain controlled torsional and biaxial (tension-torsion) low cycle fatigue behavior of Waspaloy was studied at room temperature as a function of heat treatment. Biaxial tests were conducted under proportional (when the axial and torsional strain cycles are in-phase) and non-proportional (when the axial and torsional strain cycles are 90 deg out-of-phase) cyclic conditions. The deformation behavior under these different cyclic conditions were evaluated by slip trace analysis. For this, a Schmidt-type factor was defined for multiaxial loading conditions and it was shown that when the slip deformation is predominant, non-proportional cycles are more damaging than proportional or pure axial or torsional cycles. This was attributed to the fact that under non-proportional cyclic conditions, deformation was through multiple slip as opposed single slip for other loading conditions, which gave rise to increased hardening. The total life for a given test condition was found to be independent of heat treatment. This was interpreted as being due to the differences in the cycles to initiation and propagation of cracks. |
| NASA分類 | STRUCTURAL MECHANICS |
| レポートNO | 90N28880
NASA-CR-180406
NAS 1.26:180406 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/136223 |
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