Abstract
The fatigue properties of Inconel 718 in long life region up to 108 cycles were investigated under rotating bending at room temperature and 500°C. The early propagation of a crack was suppressed by oxide induced crack closure. Consequently, fatigue strength was higher at 500°C than at room temperature. Surface fracture occurred at high stress levels and internal fracture occurred in long life region beyond 107 cycles at 500°C. Correspondingly, S-N curve at 500°C presented in a step-wise shape, compared to the conventional one-step shape at room temperature. Intergranular cracking was observed at the origins of internal fracture at 500°C.
| Original language | English |
|---|---|
| Pages (from-to) | 321-326 |
| Number of pages | 6 |
| Journal | Key Engineering Materials |
| Volume | 243-244 |
| DOIs | |
| Publication status | Published - 2003 |
| Externally published | Yes |
| Event | Proceedings of the International Conference on Experimental and Computational Mechanics in Engineering - Dunhuang, China Duration: Aug 24 2002 → Aug 27 2002 |
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering