Title

Numerical Simulation of the Evolution of Solidification Microstructure in Laser Deposition

Abstract

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.

Meeting Name

18th Annual Solid Freeform Fabrication Symposium

Department(s)

Mechanical and Aerospace Engineering

Second Department

Materials Science and Engineering

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2007 University of Texas Press, All rights reserved.

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