About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Additively manufactured Nb alloys: Considerations for processability, microstructure evolution, and mechanical behavior |
| Author(s) |
Saket Thapliyal, Haozhi Zhang, Julio Ortega Rojas, Brian Jordan, Christopher Ledford, Timothy Horn, Sebastien Dryepondt, Michael Kirka |
| On-Site Speaker (Planned) |
Saket Thapliyal |
| Abstract Scope |
Considering the vast component and microstructure design space enabled by fusion-based additive manufacturing (F-BAM) processes, the scale-up manufacturing of Nb-alloys with F-BAM is advantageous for structural applications. Furthermore, leveraging the ‘high-entropy’ concept in Nb-containing alloys potentially provides a pathway for designing strong and lightweight ultra-high temperature alloys. However, the processing of these alloys remains challenging due to their high tendency to undergo impurity-induced embrittlement. Additionally, the microstructural heterogeneities that are prevalent within the F-BAM-processed alloys have significant implications for the room- and elevated-temperature mechanical behavior. In this talk, we discuss the F-BAM processability, solidification behavior, and mechanical behavior of Nb alloys, including a Nb-rich refractory-high entropy alloy. Implications of F-BAM-generated microstructurally heterogeneous regions for room- and elevated-temperature tensile behavior and damage mechanisms are revealed. Considerations in fabricating crack-free components with F-BAM are discussed. The chemistry-processing-structure-properties relationships as discussed here will enable design of scalable refractory alloys with high-specific strength. |
| Proceedings Inclusion? |
Planned: |