About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Materials Design and Alloy Development IV: Rapid Development
|
Presentation Title |
Hydrogen-aided Microstructural Engineering of Additively Manufactured Ti-6Al-4V Alloy |
Author(s) |
Lara Draelos, Peeyush Nandwana, James Paramore, Brady Butler, Ankit Srivastava |
On-Site Speaker (Planned) |
Lara Draelos |
Abstract Scope |
Additive manufacturing of Ti-6Al-4V alloy via Electron beam melting (EBM) produces unconventional microstructures and defects. Thus, the as-fabricated material is in general subjected to hot isostatic pressing during which the pressure aids in pore closure while the heat-treatment impacts the resulting microstructure. This heat-treatment can be carried out below or above the beta-transus temperature. The sub-transus heat-treatment, however, does not mitigate the adverse effects of the unconventional microstructure while super-transus heat-treatment leads to lamellar microstructures that are prone to strain localization. Herein, we demonstrate that hydrogen-aided heat-treatment is an effective way to engineer the unconventional microstructure of the EBM processed Ti-6Al-4V alloy. Specifically, we show that hydrogen-aided heat-treatment produces wrought-like microstructures without compromising the ductility of the material. Furthermore, since hydrogen reduces the beta-transus temperature it allows us to carry out microstructure engineering at relatively lower temperatures. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Mechanical Properties, Titanium |