Title

Probabilistic Simulation of Solidification Microstructure Evolution During Laser-Based Metal Deposition

Abstract

A predictive model, based on a Cellular Automaton (CA) - Finite Element (FE) method, has been developed to simulate microstructure evolution during metal solidification for a laser based additive manufacturing process. The macroscopic FE calculation was designed to update the temperature field and simulate a high cooling rate. In the microscopic CA model, heterogeneous nucleation sites, preferential growth orientation and dendritic grain growth kinetics were simulated. The CA model was able to show the entrapment of neighboring cells and the relationship between undercooling and the grain growth rate. The model predicted the dendritic grain size, structure, and morphological evolution during the solidification phase of the deposition process. Model parameters for the simulations were based on stainless steel 316 (SS 316).

Meeting Name

23rd 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

© 2013 University of Texas Press, All rights reserved.

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