| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Bcc-Superalloys
|
| Presentation Title |
Identification of the B2 Phase in the TaRe Binary BCC Phase Field via Multiscale Characterization Techniques and Neutron Diffraction |
| Author(s) |
Bryan Crossman, Junxin Wang, Loic Perriere, Jean-Philippe Couzinie, Maryam Ghazisaeidi, Michael Mills |
| On-Site Speaker (Planned) |
Bryan Crossman |
| Abstract Scope |
To meet the demands of the energy and transportation industries new materials with higher melting temperatures are required. Refractory B2+BCC based superalloys are promising candidates due to their high melting temperatures and interesting mechanical properties. Simulations using the Multi-Cell Monte Carlo (MC2) methods predicted numerous refractory systems with high temperature stable B2 phases. One is the TaRe binary system, for which no B2 phase has been reported yet. A Ta65Re35 alloy was prepared and investigated using SEM and S/TEM identifying equiatomic TaRe precipitates embedded in a BCC matrix. The precipitates exhibited no B2 superlattice reflections potentially due to the similarity in electron scattering factors for Ta and Re. This work utilizes the high dynamic range of the electron microscope pixel array detector (EMPAD) and 4D STEM to attempt to detect these weak B2 superlattice reflections. In neutron diffraction B2 superlattice peaks were observed confirming the presence of the B2 phase. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Characterization, |