Simulation on Dendrite Growth during Solidification of Ti-45%Al Alloy in the Weld Pool

A dendritic growth model was established by a combination of the characteristics of Cellular Automata (CA) and the physical properties of dendritic growth, the growth morphology of equiaxial and cylindrical crystal of Ti-45%Al alloy was simulated in the isothermal field, and the distribution of solute concentration was analyzed. Based on the CA model of dendritic growth, the welding heat process and the arc-shaped pool model in the process of welding solidification were coupled by the interpolation method, followed by the simulation of the micro structural growth during the solidification of the molten pool.