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 |
A Compositionally Dependent Crystal Plasticity and Strength Model for High-Temperature Refractory Alloys |
| Author(s) |
Luke Robinson, Leonidas Zisis, Michael Sangid |
| On-Site Speaker (Planned) |
Luke Robinson |
| Abstract Scope |
Identifying and designing alloy compositions that deliver high specific strength over a large range of operating temperatures remains a significant challenge for many high-temperature applications. Specifically, predicting the onset of plasticity and subsequent rate-dependent deformation in BCC alloys as a function of composition, temperature, and crystallographic texture would further enable design of high-performance refractory alloys that exhibit suitable mechanical performance at temperatures exceeding the melting point of Ni-based superalloys. Here, an analytical framework for predicting the rate-dependent deformation based on the composition of refractory alloys is developed as a function of temperature, linking crystallographic structure at the mesoscale with thermally activated dislocation reaction mechanisms that underpin the strength response of high-performance refractory-based alloys. Deformation regimes are identified, including glide-controlled, jog-controlled, and microstructure-controlled. Numerical predictions of local deformation and strain partitioning within a representative 3D microstructure configuration are visualized and discussed based on alloy composition and operating temperature. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, High-Temperature Materials, Modeling and Simulation |