| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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| Symposium
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2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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| Presentation Title |
Influence of Silane-doped Argon Processing Atmosphere on Powder Recycling and Part Properties in L-PBF of Ti-6Al-4V |
| Author(s) |
Nicole Emminghaus, Robert Bernhard, Jörg Hermsdorf, Ludger Overmeyer, Stefan Kaierle |
| On-Site Speaker (Planned) |
Nicole Emminghaus |
| Abstract Scope |
In the additive manufacturing of metal powders the residual oxygen in the processing atmosphere plays a crucial role, especially highly reactive materials like titanium alloys. Besides oxidation of the built parts, it leads to oxygen pick-up into the unmolten powder. Since oxidized particles cannot be removed during recycling, the powder properties deteriorate after multiple uses. In this work, Ti-6Al-4V powder was processed under conventional argon atmosphere (residual oxygen content < 0.01 vol.-%) as well as silane-doped argon atmosphere (< 0.001 vol.-% silane in argon). The silane-doping leads to a residual oxygen content of < 10-20 vol.-%. The powder was sieved and reused 5 times for each atmosphere. The powder properties morphology, chemical composition and flowability were analyzed for virgin as well as reused powder. Furthermore, the roughness and relative density of the built parts was evaluated. It is hypothesized that oxygen-free production improves recyclability and thus resource efficiency. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |