| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Design of Silicide Strengthened Nb Alloys for Additive Manufacturing |
| Author(s) |
Alice E. Perrin, Ying Yang, Ryan DeHoff, Michael Kirka |
| On-Site Speaker (Planned) |
Alice E. Perrin |
| Abstract Scope |
Three refractory metal intermetallic composite (RMIC) alloys have been designed using CALPHAD modelling with the primary goals of promoting the Nb+Nb5Si3 eutectic reaction, increasing oxidation resistance, and decreasing the solidification temperature range. The Nb5Si3 phase was targeted because silicide precipitates increase specific strength and stiffness of alloys. A smaller solidification temperature range reduces hot cracking tendencies in additive manufactured alloys. These Nb-Si-Cr and Ni-Si-Cr-Mo alloys were cast and then surface processed with laser welding at different speeds to simulate additive manufacturing. The bulk cast alloys as well as the weld tracks were characterized through SEM, TEM, and hardness testing to determine if the phases predicted from modelling were accurate, and to quantify the effects of the size and phase fraction of each phase on the mechanical properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Characterization, Phase Transformations |