| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Opportunities to Develop Superior Titanium Alloys by Laser Powder Bed Fusion |
| Author(s) |
Marco Simonelli, Graham McCartney, Zou Zhiyi, Nesma Aboulkhair, Yau Yau Tse, Adam Clare, Richard Hague |
| On-Site Speaker (Planned) |
Marco Simonelli |
| Abstract Scope |
This talk presents two strategies to address mechanical anisotropy and increase strength/ductility in α + β titanium (Ti) alloys produced by laser powder-bed fusion (L-PBF).
The first strategy leverages (i) the α/β orientation relationship, and (ii) the crystallographic defects naturally forming during L-PBF, to induce β grain refinement via specially designed rapid heat treatments. Grain refinement is characterized by high-temperature EBSD (up to 1000 °C) to inform on the early nucleation and growth of recrystallized β grains.
In the second strategy, we develop a novel quaternary Ti-6Al-4V-Fe alloy with the aim to increase strength and ductility. L-PBF allows the use of significant Fe contents to generate heat treatable laminar and refined α + β microstructures. Mechanical testing and deformation mechanisms of the new alloys are studied by synchrotron X-ray diffraction, microstructural analysis and fractography. The merits and limitations of this alloy design strategy and future outlooks will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Solidification |