# Large-scale multiscale modeling of phase transformation in nanocrystalline materials: Atomistic and Phase-Field methods

## TL;DR

This paper combines atomistic and phase-field modeling techniques to study phase transformations in nanocrystalline aluminum, aiming to optimize manufacturing processes and microstructural properties.

## Contribution

It develops a multiscale modeling framework linking manufacturing variables to microstructure, integrating atomistic and mesoscopic methods for improved analysis.

## Key findings

- Atomistic modeling captures phase transformation kinetics accurately.
- Phase-field approach offers faster simulations with semi-empirical data.
- Multiscale model aids in optimizing manufacturing conditions.

## Abstract

In this research, atomistic molecular dynamics simulations are combined with mesoscopic phase-field computational methods in order to investigate phase-transformation in polycrystalline Aluminum microstructure. In fact, microstructural computational modeling of engineering materials could help to optimize their mechanical properties for industrial applications (e.g. directional solidification for turbine blades). As a result, a multiscale modeling approach is developed to find a relation between manufacturing variables (e.g. temperature) and microstructural properties of crystalline materials (e.g. grain size), which could be used to develop an advanced manufacturing process for sensitive applications. The results show that atomistic modeling of grain growth could be used as a first-principle approach in order to study phase transformation's kinetics, which could capture morphology of polycrystalline materials more accurately. On the other hand, phase-field mesoscopic approach needs less computational efforts, but still it relies on semi-empirical data to capture accurate phase transformation regimes, which makes this approach suitable for rapid examining of new manufacturing conditions as well as its effects on microstructural properties of polycrystalline materials.