About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Development of Powders
|
| Presentation Title |
Gas Atomization and Additive Manufacturing of Nb-W-Zr Alloy |
| Author(s) |
John Reidy, Gianna Valentino, Ian McCue |
| On-Site Speaker (Planned) |
John Reidy |
| Abstract Scope |
Nb-base alloys have long been studied for potential use in high temperature applications due to their high melting temperature. Additive manufacturing (AM) offers a new opportunity to engineer microstructures in these alloys, potentially improving their performance. In this work, Nb-10 wt.% W-2.5 wt.% Zr (NbWZr) alloy powder was fabricated by electrode induction melting gas atomization. Parameter sweeps of single-track and coupon builds were conducted using a laser powder bed fusion (L PBF) system to determine optimal process parameters. A modified powder variant, NbWZr-HfC, was prepared by ball milling 1 wt.% HfC nanoparticles with the base NbWZr powder. Using the optimized L-PBF parameters, tensile bars of both NbWZr and NbWZr-HfC compositions were fabricated. Their tensile properties at elevated temperatures were evaluated and compared to those of wrought NbWZr. Characterization of all three alloys conditions was carried out to assess the microstructural effect of AM processing and the addition of HfC precipitates. |