| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development II
|
| Presentation Title |
A-72: Predicting Phase Morphologies in AM Titanium |
| Author(s) |
Ian N. Bakst |
| On-Site Speaker (Planned) |
Ian N. Bakst |
| Abstract Scope |
Accurately predicting the microstructure and grain morphology of titanium alloys processed through additive manufacturing (AM) techniques presents various difficulties. One such source of difficulty is the formation of martensitic phases (á’, á”, ù, etc.) at the speedy cooling rates inherent to AM processes. The formation of these phases is governed by energetic competition between martensitic and diffusion driving forces. Current thermodynamic databases are limited in their prediction of these phases due to insufficient data for such high cooling rates. Through multi-scale simulation, we improve on the predictions of resulting microstructure of AM titanium. The energy barriers and rates of diffusion-driven and diffusionless phase transformations are computed, as are their relationships to temperature and chemistry. From these rates, we model the evolution of phase morphology in AM titanium. Honeywell Federal Manufacturing & Technologies is operated for the United States Department of Energy under Contract Number DE-NA-0002839. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |