About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Bridging Scales: Deformation and Damage Mechanisms in Microstructurally and Compositionally Complex Metallic Alloys
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| Presentation Title |
Tensile Ductility and Plastic Deformation Behavior of Polycrystalline Refractory Multi-Principal Element Alloys |
| Author(s) |
Leah H. Mills, James Lamb, Kaitlyn M. Mullin, McLean P. Echlin, Jean-Charles Stinville, Marie-Agathe Charpagne, Valéry Valle, Noah P. Philips, Daniel S. Gianola, Tresa M. Pollock |
| On-Site Speaker (Planned) |
Leah H. Mills |
| Abstract Scope |
The high temperature strength of Refractory Multi-Principal Element (RMPE) alloys is promising for extreme structural applications, motivating the evaluation of ambient temperature tensile ductility and fundamental exploration of the heterogeneity of plastic deformation in polycrystals. Microstructure development to achieve recrystallized and single-phase materials (by cold-rolling and annealing processing paths) will be presented for a wide variety of RMPE alloys (Nb33Ta33Ti33, Hf20Nb20Ta20Ti20Zr20, Hf10Nb35Ta30Ti25, Hf10Mo2Nb35Ta30Ti25), commercially relevant refractory alloys (C103, WC-3009), and pure Nb. The measurement of their macro-scale mechanical performance is paired with in-SEM high-resolution digital image correlation (HR-DIC) of both monotonic tensile samples and nanoindentation to determine activated dislocation slip systems for distributions of correlated grain orientations. The impact of elastic anisotropy on slip localization will be a focus. The importance of local polycrystalline “neighborhoods” will also be addressed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Temperature Materials, Mechanical Properties |