| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2023
|
| Presentation Title |
Impact of Ti and Al on Ordered B2 Formation in Potential High Temperature RCCAs |
| Author(s) |
Jaimie Tiley, Soumya Nag, Sriswaroop Dasari, Li Cheng, Christopher Fancher, Raymond Unocic, Jason Gardener, Fan Zhang, Rajarshi Banerjee |
| On-Site Speaker (Planned) |
Jaimie Tiley |
| Abstract Scope |
Meta-stable and heterogenous structures within refractory complex concentrated alloys (RCCAs) provide creative new strengthening mechanisms for material use within extreme environments. The use of ordered structures and chemical segregation coupled with heterogenous phase nucleation sites produced through processing allows increased tailoring of specific microstructures. This research investigates the impact of Ti and Al additions on the formation of heterogeneous B2 and related ordered structures within a TiAlNbTaZr alloy, including the subsequent impact on mechanical properties. Potential compositions for a new candidate alloys were determined through validated CALPHAD models, arc melted, homogenized at 1300C for 24 hours and tested to evaluate phase evolution. Ternary combinations were used to optimize compositions and assess relative strength from precipitates and possibly B2 phases within a BCC matrix. Samples were evaluated using neutron and X-ray diffraction, atom probe tomography, transmission electron microscopy, and mechanical testing at elevated temperatures. |
| Proceedings Inclusion? |
Undecided |