| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Direct Energy Deposition of Nb-containing Refractory Alloys: Solidification Behavior, Microstructural Evolution, and Mechanical Properties |
| Author(s) |
Saket Thapliyal, Julio O. Rojas, Patxi Fernandez-Zelaia, Christopher Ledford, Andres M Rossy, Michael M Kirka, Paul Brackman, Michael C Gao, David Alman |
| On-Site Speaker (Planned) |
Saket Thapliyal |
| Abstract Scope |
Fusion-based additive manufacturing (F-BAM) processes have vastly augmented the component design space for the manufacture of geometrically complex components for high efficiency turbine engines. However, the compositional space that leads to alloys with good microstructural stability and good F-BAM printability still needs exploration. To this end, we assess the printability of the refractory alloy C103 (Nb-10Hf-1Ti) with direct energy deposition (DED) F-BAM process. The effect of DED processing conditions on the segregation and solidification behavior, microstructural evolution, and mechanical behavior has also been reported. The DED-processed components exhibited a crack-free columnar-grained microstructure with relative density of >99%. The implications of rapid solidification during DED on the nucleation and growth of brittle phases that form during conventional processing of C103 alloy have been discussed. Additionally, we outline the alloy design considerations that may lead to enhanced microstructural hierarchy and heterogeneity, and thus improved mechanical performance in F-BAM processed Nb-containing refractory alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Mechanical Properties |