| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Recent Advances in Titanium Science and Technology: MPMD/SMD Symposium Honoring Professor Dipankar Banerjee
|
| Presentation Title |
High Cycle Fatigue, Notches, R-ratio and Macrozones in Ti-6Al-4V |
| Author(s) |
David Dye, Yan Gao |
| On-Site Speaker (Planned) |
David Dye |
| Abstract Scope |
Titanium alloys, particularly large forgings, often show reductions in performance at elevated loading ratios (R) relative to a straight-line Goodman diagram, and particularly in notch fatigue. Here we examine the dislocations mechanisms and fractography underlying this behaviour and their interaction with microstructure in near-equiaxed plate and large forgings, and compare to bimodal large forgings, and show that both microstructure and macrozones are intimately bound up in these behaviours. Furthermore, even quite 'disorganised' macrozones can give rise to the effect. |
| Proceedings Inclusion? |
Planned: |