| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Effect of Macrozone-notch Interaction on High Cycle Fatigue in Bimodal Ti-6Al-4V |
| Author(s) |
Yan Gao, Nigel Martin, Jamie Moschini, David Dye |
| On-Site Speaker (Planned) |
Yan Gao |
| Abstract Scope |
Ti64 is one of the most widely used Ti alloys in industry. A high cycle fatigue (HCF) life debit of about 40% has been observed when the loading cycle exceeds 1e7 for large forgings of Ti64. This phenomenon leads to industrial concern in its applications such as airplane fan blade plates and engine discs. It is hypothesized that the existence of notch-like features in Ti64 interacting with the macrozones is the underlying cause for the life debit. The effect of placing the notch root in hard/soft macrozone combinations found in EBSD under R=0.5 HCF conditions was examined and the associated initiation was observed on SEM. Subsequent EBSD and TEM were used to inspect the surrounding micro-texture and dislocation in and around the initiation facet. |
| Proceedings Inclusion? |
Planned: |