About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing of Refractory Metallic Materials
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Presentation Title |
Surrogate Additive Processes of Refractory Multi-principal Element Alloys |
Author(s) |
Anna K. Rawlings, Andrew Birnbaum, John Steuben, Colin Stewart, Eric Patterson, John Michopoulos, Mitra Taheri |
On-Site Speaker (Planned) |
Anna K. Rawlings |
Abstract Scope |
A refractory multi-principal element alloy (MPEA) of 26Nb – 9Ta – 25Ti – 30Zr was laser processed using single tracks across parametric space to explore processing-structure-property relationships. While the composition of the homogenized, unprocessed alloy is experimentally shown to be single phase BCC, substitution of Ta for Nb in this composition space is known to induce a two-phase separation when subject to low cooling rate during solidification and heat treatments. In contrast, the effects of highly non-equilibrium solidification and the process environment (in both Ar and N atmospheres) are assessed via phase formation, elemental partitioning and loss, and melt pool heterogeneities through scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and energy dispersive spectroscopy (EDS). Mechanical responses highlighting the difficulties of and phenomena associated with laser processing refractory MPEAs are demonstrated through the crack susceptibility and nano-indentation response across the fusion zones. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Temperature Materials, Characterization |