| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Microstructural Manipulation of LPBF Ti-6Al-4V by Hydrogen Heat Treatment |
| Author(s) |
Matthew Dunstan, Matthew Vaughn, James Paramore, Brady Butler, Kevin Hemker, Andelle Kudzal |
| On-Site Speaker (Planned) |
Matthew Dunstan |
| Abstract Scope |
In laser powder bed fusion additive manufacturing (AM) of Ti-6Al-4V, the resulting microstructure in the as-printed state is martensitic in nature due to the rapid cooling rates and thermal cycling which results in high strength, low ductility tensile properties. Post AM heat treatments can be used to decompose these martensitic microstructures and improve the ductility, but due to the continuous network of retained β phase the manipulation of these microstructures is limited. In this work, the effects of maximum temperature of a post-processing heat treat utilizing a hydrogen atmosphere are explored as a method to manipulate the microstructure and to improve tensile ductility of extra low interstitial Ti-6Al-4V produced by laser powder bed fusion. Low maximum temperatures coupled with an inert globularization heat treatment are found to produce tensile properties comparable with hot isostatic pressing reaching ultimate strengths of 1 GPa and 19% elongation at failure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Phase Transformations, Titanium |