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A modified scheil approach for nucleation-dependent solidification pathways
DOI:10.1016/j.actamat.2026.122297.png)
Abstract
En 中文
• A model and algorithm are developed to predict nucleation-dependent solidification pathways while maintaining thermodynamic consistency with the Scheil–Gulliver limit. • The model unifies the coupled-zoned phenomena (i.e., primary phase formation in eutectic regions) with the stable/metastable phase selection based on a nucelation-competition mechanism. • Experimental validation in Al-Fe(-Si) alloys provide mechanistic insights on non-equilibrium microstructure formation that cannot be predicted by the classical Scheil–Gulliver model. • The model retains CALPHAD-level numerical efficiency, enabling high-throughput solidification calculations and mapping across high-dimensional compositional spaces.
Keywords:
nucleation-dependent solidification
Scheil–Gulliver limit
phase selection
CALPHAD
microstructure formation

