A Phase Field Crystal Model of Phase and Microstructural Stability in Driven Nanocrystalline Systems

TL;DR

This paper introduces a phase field crystal model that captures the microstructural evolution of driven nanocrystalline systems, integrating ballistic effects and elasto-plastic behavior for more accurate simulations.

Contribution

It combines the phase field crystal approach with ballistic mixing effects, enabling detailed modeling of driven nanocrystalline microstructures with elastic and plastic effects.

Findings

Model successfully describes grain growth under external driving.

Incorporates ballistic mixing into atomistic phase field formalism.

Predicts microstructural stability in driven nanocrystalline systems.

Abstract

We present a phase field crystal model for driven systems which describes competing effects between thermally activated diffusional processes and those driven by externally imposed ballistic events. The model demonstrates how the mesoscopic Enrique and Bellon [Phys. Rev. Lett. 84, 2885 (2000)] model of externally induced ballistic mixing can be incorporated into the atomistic phase field crystal formalism. The combination of the two approaches results in a model capable of describing the microstructural and compositional evolution of a driven system, while incorporating elasto-plastic effects. The model is applied to the study of grain growth in nanocrystalline materials subjected to an external driving.