| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Compositional Effects on the Formation and Thermal Evolution of Oxygen-Ordered Precipitates in Ti-Zr-O Alloys: An In-Situ Synchrotron X-Ray Diffraction Study |
| Author(s) |
Raphaelle Guillou, Fabienne Amann, Régis Poulain, Stéphanie Delannoy, Jean Philippe Couzinié, Ivan Guillot, Emmanuel Clouet, Jean Luc Béchade, Dominique Thiaudière, Frédéric Prima |
| On-Site Speaker (Planned) |
Raphaelle Guillou |
| Abstract Scope |
Interstitial elements, particularly oxygen, significantly influence the mechanical properties of titanium alloys. Oxygen additions increase strength but reduce ductility due to interactions between dislocations and oxygen atoms. To mitigate this loss of ductility, efforts focus on limiting oxygen diffusion during thermal treatments. The challenge is to develop "oxygen-tolerant" titanium alloys that leverage oxygen hardening without embrittlement. In this context, ternary Ti-Zr-O α-alloys with 0.15 to 0.6 wt% oxygen and 0 to 4,5 wt% zirconium have been developed. These alloys exhibit Ti6O-type nano-precipitates resulting from local oxygen ordering in octahedral interstitial sites (predicted by ab-initio calculations). This study characterizes the thermal stability and compositional range of these nano-precipitates, using in-situ thermal cycles with an induction furnace coupled to DiffAbs beamline at the SOLEIL synchrotron. The influence of composition on the structure and stability of the nano-precipitates will be discussed to establish what implications this may have for future research directions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Biomaterials, Characterization |