Author(s)

Min Zhang, Qin Xue, Lulu Li, Jihong Li

School of Materials Science and Engineering, Xi’an University of Technology, Xi’an, China.

A new model of dendritic growth and solute distribution of Fe-0.04%C binary alloys was developed, which is based on the sharp interface model of dendritic growth. This innovative model improved the cellular automaton method, combined with the finite difference method, considered concentration field, temperature field and the shape of molten pool. This model simulated the growth morphologies of single equiaxial crystal, the relationship between tip growth velocity and time, multi-equiaxed crystals’ growth morphologies and solute distribution, the growth of columnar crystals, columnar-to-equiaxed transition after coupling temperature field, and compared with experimental results. The results indicate that crystallographic orientation has certain influence on dendritic morphologies, that the tip growth velocity tends to be stable with the extension of time in the end, that the shape of molten pool influences the growth morphologies of columnar crystals and that the solute mainly concentrates in dendritic roots and among grain boundaries. The simulated results are in accord with experimental results.

Cellular Automaton-Finite Difference (CA-FD) Method, Dendritic Growth, Style, The Solute Distribution, The Temperature Distribution

Zhang, M. , Xue, Q. , Li, L. and Li, J. (2017) A Two-Dimensional Computational Model for the Simulation of Dendritic Microstructure and Solute Distribution of Fe-0.04%C Alloys. World Journal of Engineering and Technology, 5, 175-187. doi: 10.4236/wjet.2017.52014.