| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2025
|
| Presentation Title |
Temperature Dependent Deformation in Single Crystalline MoNbTi |
| Author(s) |
Daniel Magnuson, Benjamin Redemann, Tyrel McQueen, Pulkit Garg, Irene Beyerlein, Kevin Hemker |
| On-Site Speaker (Planned) |
Daniel Magnuson |
| Abstract Scope |
Recent studies have shown that RT dislocation motion in BCC RMPEAs fundamentally differs from dilute alloys; as evidenced by the preferential activation of higher-order slip planes and the reduced prevalence of long, straight screw dislocations. In this study, single crystals of MoNbTi were grown, oriented to interrogate specific slip systems, and deformed in tension at temperatures exceeding 1,000oC. The measured elevated temperature tensile response will be coupled with slip trace analysis, electron microscopy characterization, and phase field dislocation dynamic simulations (PFDD) to characterize the underlying deformation mechanisms. The mechanical tests will be used to refine the computational models, which will in turn highlight slip systems of interest for testing. The extent to which the multiplicity of slip and increased ratio of edges to screws is present at elevated temperatures will be studied. Uncovering the mechanisms of dislocation motion is key for understanding the high-temperature behavior of RMPEAs in general. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, High-Temperature Materials, Mechanical Properties |