About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Tailoring the beta-omega compositional partitioning to achieve high strength and ductility in laser powder bed fusion processed metastable beta Ti alloys (invited) |
| Author(s) |
Rajarshi Banerjee, Tirthesh Ingale, Srinivas Aditya Mantri, Abhishek Sharma, Advika Chesetti, Frederic Prima, Fan Sun, Narendra Dahotre |
| On-Site Speaker (Planned) |
Rajarshi Banerjee |
| Abstract Scope |
Metastable β titanium alloys such as Ti-10V-2Fe-3Al, in their single β-phase condition, can exhibit high strain hardening and uniform plastic strain due to transformation-induced plasticity (TRIP) and/or twinning-induced plasticity (TWIP), but they generally suffer from low yield strength. In this study, we show that controlling the process parameters, primarily the scan or raster speed of the laser beam during laser powder bed fusion (LPBF) based AM processing allows for a precise tailoring of the compositional partitioning between isothermal omega precipitates and the surrounding beta matrix. By optimizing the process parameters during AM processing, we achieve a high yield strength (~1 GPa) in the LPBF-processed Ti-10V-2Fe-3Al alloy while preserving the TRIP/TWIP mechanisms to maintain good uniform plastic elongation. The size scale, composition, and distribution of these isothermal omega precipitates in the as-printed specimens was analyzed using advanced characterization techniques, to establish the correlation between beta-omega compositional partitioning and mechanical properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Additive Manufacturing, Characterization |