3D stochastic modelling of microstructure evolution during solidification of alloy 718

Abstract

A three-dimensional (3D) stochastic model for simulating the evolution of dendritic crystals during the solidification of alloys has been developed. The model includes time-dependent computations for temperature distribution, solute redistribution in the liquid and solid phases, curvature, and growth anisotropy. The current 3D simulation software was written in Fortran 90 with threading (shared memory system with multiple cores) in both native Linux and Windows threads. This 3D software is highly efficient. It can run on PCs with reasonable amount of RAM and CPU time. 3D stochastic mesoscopic simulations at the dendrite tip length scale were done to simulate the evolution of the columnar and equiaxed dendritic microstructures, columnar-to-equiaxed transition and segregation patterns during solidification of alloy 718.