| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Local Chemical Ordering and Its Impact on Mechanical Behaviors, Radiation Damage, and Corrosion
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| Presentation Title |
Temperature-Dependent Behavior of Local Chemical Ordering in the structure of CrCoNi |
| Author(s) |
Guilherme Cardeal Stumpf, Vinicius Bacurau, Caroline Stoco, Gustavo Bertoli, Eric Mazzer, Francisco Gil Coury |
| On-Site Speaker (Planned) |
Guilherme Cardeal Stumpf |
| Abstract Scope |
Understanding the chemical distribution in multi-principal element alloys poses great experimental and theoretical challenge. Local chemical ordering (LCO) is believed to significantly alter these alloys' properties and behavior. This study investigates the LCO phenomenon in an annealed CrCoNi alloy, heat-treated at 748 K for 100 hours. dilatometry analysis with in situ high energy X-ray diffraction, allowed the characterization of the lattice parameter with varying temperatures in heating, cooling and reheating cycles. The experimental results were compared with atomistic simulations under equilibrium conditions. Our findings revealed an anomalous behavior in the lattice parameter variation pattern within a temperature range (around 840 K) corresponding to a peak in the coefficient of thermal expansion plot. Differential scanning calorimetry analysis, in the absence of other competing factors, confirmed an endothermic peak associated with LCO at the same temperature range. The results highlight LCO's structural influence, offering insights into its temperature-dependent behavior. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Entropy Alloys, Modeling and Simulation |