About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XX
|
Presentation Title |
Processability of Cu-Ti-based Metallic Glasses via Laser Powder Bed Fusion |
Author(s) |
Erika Soares Barreto, Erika Soares Barreto, Maximilian Frey, Jan Wegner, Stefan Kleszczynski, Ralf Busch, Lutz Mädler, Lutz Mädler, Nils Ellendt, Nils Ellendt |
On-Site Speaker (Planned) |
Erika Soares Barreto |
Abstract Scope |
Laser powder bed fusion of metals (PBF-LB/M) has been increasingly researched for manufacturing bulk metallic glasses with size and geometry freedom. However, challenges along the processing route towards avoiding crystallization and contamination often compromise the high-quality, amorphous parts production. Here, different purities of Cu-Ti-Zr-Ni glass-formers microalloyed with Si and Si-Sn were gas-atomized and additively manufactured to evaluate the overall processability via the layer-wise fabrication route. Results show good powder flowability, although a propensity for moisture uptake. Increasing oxygen absorption is observed in each processing step, considerably influenced by feedstock purity and gas-atomization. The GFA of powders and PBF-LB/M parts presented negligible differences for the same alloy type, despite varied oxygen levels. The cooling rates of both gas-atomization and the PBF-LB/M process are sufficient for vitrification. Microalloying increases the thermal stability of alloys, yet over an increased brittleness, as seen by an enhanced crack formation. |
Proceedings Inclusion? |
Planned: |
Keywords |
Powder Materials, Additive Manufacturing, Other |