| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Bcc-Superalloys
|
| Presentation Title |
Challenges facing the design of refractory BCC-B2 alloys for 3D printing |
| Author(s) |
Kaitlyn M. Mullin, Carolina Frey, Syed I. A. Jalali, Michael Patullo, Kevin Hemker, Tresa Pollock |
| On-Site Speaker (Planned) |
Kaitlyn M. Mullin |
| Abstract Scope |
Emulating the Ni-base superalloy γ+γ’ microstructure in BCC+B2 refractory alloys is a promising design strategy to achieve fabricability and high temperature strength. Coherent B2 precipitates with high thermal stabilities in refractory alloys have been achieved using Ru-base B2s. However, a historical tradeoff in γ+γ’ Ni superalloys is encountered when increased precipitate volume fractions for strengthening result in compromises in printability. In this study, the solidification behavior of HfRu and ZrRu containing Nb-base alloys are evaluated with respect to their alloy chemistries and solvus temperatures. Single track laser experiments are performed to investigate crack defects under laser melting conditions. A custom heating set-up is employed to measure the liquidus and solidus temperatures of these alloys. The tendency for cracking is shown to be dependent on the B2 compound, solvus temperature, and elemental partitioning behavior. Results from these experiments can provide guidance for the fabricability and production of refractory BCC-B2 superalloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Additive Manufacturing, |