Numerical Simulation of the Evolution of Solidification Microstructure in Laser Deposition
A predictive model is developed to simulate the evolution of the solidification microstructure during the laser deposition process. The microstructure model is coupled with a comprehensive macroscopic thermodynamic model. This model simulates dendritic grain structures and morphological evolution in solidification. Based on the cellular automata approach, this microstructure model takes into account the heterogeneous nucleation both within the melt pool and at the substrate/melt interface, the growth kinetics, and preferential growth directions of dendrites. Both diffusion and convection effects are included. This model enables prediction and visualization of grain structures during and after the deposition process. This model is applied to Ti-6Al-4V.
Z. Fan et al., "Numerical Simulation of the Evolution of Solidification Microstructure in Laser Deposition," Proceedings of the 18th Annual Solid Freeform Fabrication Symposium (2007, Austin, TX), pp. 256-265, University of Texas Press, Aug 2007.
18th Annual Solid Freeform Fabrication Symposium (2007: Aug. 6-8, Austin, TX)
Mechanical and Aerospace Engineering
Materials Science and Engineering
Keywords and Phrases
Automata Theory; Cellular Automata; Crystal Microstructure; Deposition; Grain Size and Shape; Interfaces (materials); Diffusion and Convection; Heterogeneous Nucleation; Microstructure Model; Morphological Evolution; Predictive Modeling; Preferential Growth; Solidification Microstructures; Thermodynamic Model; Solidification
Article - Conference proceedings
© 2007 University of Texas Press, All rights reserved.
01 Aug 2007