Mean Field Modeling of Grain Growth and Zener Pinning
Kaisheng Wu, Johan Jeppsson, Paul Mason
Abstract
Abstract A mean-field model has been developed to simulate curvature-driven grain growth by exploring the evolution of grain size distribution under arbitrary thermal histories. The model was integrated into precipitation module TC-PRISMA, so that the pinning effect of the concurrently precipitated particles on the growing grains can be considered by a modified, location-specific Zener model. The developed model was validated against analytical calculations, and then applied to real alloy systems, fed with assessed grain boundary energy and mobility data. Its capabilities, limitations, and directions to improvements have been discussed.
Topics & Concepts
Zener diodeGrain boundaryCurvatureMaterials scienceZener pinningPrecipitationGrain growthGrain sizeField (mathematics)Condensed matter physicsStatistical physicsPinning forceMetallurgyPhysicsMathematicsGeometrySuperconductivityMicrostructureCritical currentVoltageMeteorologyPure mathematicsQuantum mechanicsResistorHigh Temperature Alloys and CreepAluminum Alloy Microstructure PropertiesMicrostructure and mechanical properties