About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Additive manufacturing of refractory high entropy alloy |
| Author(s) |
Jonathan Aristya Setyadji, Xipeng Tan |
| On-Site Speaker (Planned) |
Jonathan Aristya Setyadji |
| Abstract Scope |
NbMoTaW is a refractory high entropy alloy possessing excellent high-temperature performance with potential applications in aerospace, nuclear, and electronics industries. However, high melting point and brittleness present serious challenges in producing defect free parts via L-PBF where thermal cycling rates are extremely high. Here, we process pre-alloyed equiatomic NbMoTaW powder by L-PBF, studying the effects of printing parameters on the microstructure. SEM imaging revealed fine columnar grains with extensive cracking and porosity across a broad parameter range. A multiscan crack mitigation strategy yielded near crack-free parts with record highest relative density of ~99.2%. XRD and EDS analyses confirmed a single-phase disordered BCC structure. Further investigation into the micro- and nanostructural features of this alloy and how they correlate with the mechanical properties are being examined by advanced techniques including HR-TEM and atom probe reconstruction. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Entropy Alloys, High-Temperature Materials |