About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Advances in Multi-Principal Element Alloys III: Mechanical Behavior
|
Presentation Title |
D-21: Temperature Dependent Deformation in Single Crystalline MoNbTi |
Author(s) |
Daniel Magnuson, Michael Patullo, Syed I.A. Jalali, Benjamin W.Y. Redemann, Shannon Bernier, Morgan Jones, Patrick McNutt, Tyrel M. McQueen, Irene Beyerlein, Kevin J Hemker |
On-Site Speaker (Planned) |
Daniel Magnuson |
Abstract Scope |
Refractory MPEAs (RMPEAs) have shown impressive strength at high temperatures, but their elevated temperature deformation mechanisms are not well understood. Recent studies have shown that RT dislocation motion in BCC RMPEAs is fundamentally different than for 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, oriented to promote activation of specifc slip systems, and deformed in tension at temperatures exceeding 1,000oC are being used to demonstrate the extent to which the multiplicity of slip and increased ratio of edges to screws is present at elevated temperatures. The measured elevated temperature tensile response will be coupled with slip traces, TEM observations, and phase field dislocation dynamics model predictions to elucidate the underlying deformation mechanisms. 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, Mechanical Properties, High-Temperature Materials |