About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond V
|
Presentation Title |
Grain Boundary Dynamics in High Entropy Alloys |
Author(s) |
Milad Taghizadeh, Fadi Abdeljawad |
On-Site Speaker (Planned) |
Milad Taghizadeh |
Abstract Scope |
In multicomponent alloys, even minute amounts of solute accumulation at grain boundaries (GBs) significantly affect boundary dynamics. However, the influence of GB segregation on solute drag in multicomponent alloys has not been thoroughly investigated. In this study, we introduce a theoretical model of GB segregation and solute drag in multicomponent alloys. This model incorporates bulk thermodynamics and the interaction of different elemental species with GBs, and it accounts for various mass transport processes. Ternary alloys are used as a model system to investigate multicomponent effects. Computational studies reveal a range of segregation behaviors in multicomponent systems, which are influenced by the interactions of elemental species within the bulk and the GB region. Additionally, parametric analyses are conducted to reveal regimes where solute drag dominates GB migration. Our model offers opportunities to employ GB segregation as a tool to engineer alloys with tailored microstructures. |