About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Local Ordering in Materials and Its Impacts on Mechanical Behaviors, Radiation Damage, and Corrosion
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Presentation Title |
Statistical Fluctuations, Clustering and Short-range Ordering: A CALPHAD Based Thermodynamics Perspective |
Author(s) |
Alisson Kwiatkowski da Silva, Qing Chen, Dierk Raabe |
On-Site Speaker (Planned) |
Alisson Kwiatkowski da Silva |
Abstract Scope |
The physical quantities which describe a phase in equilibrium are, almost always, very nearly equal to their mean values. Nevertheless, deviations from the mean values, though small, do occur (quantities are said to fluctuate at a very small scale). Clustering and short-range ordering are examples of local deviations or fluctuations from the average disordered solid solution state of the alloy. We will discuss how the statistical distribution of clusters can be inferred from the Gibbs energy description and used to predict the existence of clustering and short-range ordering. These fluctuations must also be distinguished from fluctuations that arise in the early stage of phase decomposition, leading to phase separation and/or the formation of long-range ordered phases. We will explore some experimental cases of equilibrium and non-equilibrium fluctuations and how a thermodynamic description based on CALPHAD can help us understand them. |
Proceedings Inclusion? |
Planned: |
Keywords |
Phase Transformations, Computational Materials Science & Engineering, ICME |