About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Mechanics at the Extremes: Bridging Length-Scales From Nanoscale to Bulk
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| Presentation Title |
Atomistic Simulations on the Mie-Gruneisen Equation-of-State and High Strain-Rate Behavior of Equiatomic CoCrFeMnNi |
| Author(s) |
James Stewart, Jacob Startt, Remi Dingreville |
| On-Site Speaker (Planned) |
James Stewart |
| Abstract Scope |
High-performance materials that can tolerate temperatures, pressures, and deformation rates beyond contemporary engineering design conditions are in ever-increasing demand. Of particular interest is the equiatomic CoCrFeMnNi high-entropy alloy (HEA) in barrier coating applications where thermo-mechanical shocks are present. Understanding the high strain-rate and spallation behavior of CoCrFeMnNi necessitates the characterization and quantification of multiple fundamental properties, including equation-of-state (EOS), constitutive relationships, microstructure evolution, and dynamic deformation mechanisms. Through atomistic simulations, we elucidate the dynamic properties of CoCrFeMnNi under shock-loading conditions and characterize its equation-of-state over a wide range of densities and pressures along with spall strength at ultra-high strain rates. Simulation results reveal the role of local phase transformations during the development of the shock-wave on the alloy's spall strength. The simulated shock Hugoniot results agree with experimental data, validating the predictability of the model. These insights can drive further advancements in various applications of CoCrFeMnNi under extreme environments. |
| Proceedings Inclusion? |
Planned: |