Interaction of local solidification and remelting during dendrite coarsening - modeling and comparison with experiments.

ABSTRACT: The microstructural evolution of dendrite coarsening during isothermal holding is simulated using a quantitative cellular automaton (CA) model involving the mechanisms of both solidification and melting. The present model encompasses the essential aspects of thermodynamics and kinetics, particularly the evolution/influence of composition, temperature, and curvature, leading to valid simulations of simultaneous solidification and melting. Model validation is performed through a comparison of the CA simulations with analytical predictions for a liquid pool migrating in the mushy zone of a SCN-0.3 wt.% ACE alloy due to temperature gradient zone melting. The model is applied to simulate the microstructural evolution of columnar dendrites of a SCN-2.0 wt.% ACE alloy during isothermal holding in

SUBMITTER: Zhang Q 

PROVIDER: S-EPMC5736763 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature