Three-Dimensional Modeling and Simulation of Dendrite Morphology of Cast Mg Alloys

Abstract:

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A three-dimensional (3-D) cellular automaton (CA) model for simulating the dendrite morphology of cast Mg alloys has been developed. In the model a technique based on two sets of mesh is utilized to perform the simulation to reproduce the texture of Mg dendrites. The CA calculation is performed using a set of mesh that is defined by the hexagonal close-packed (HCP) crystal lattice, and other computations are carried out by using a cubic mesh. The two sets of mesh are coupled by using interpolation method. The kinetics of the solid-liquid interface is obtained directly by the difference between local equilibrium composition and local actual composition given by the solute transport equation. The model was used to simulate 3-D columnar growth of sixteen grains and 3-D equiaxed growth of a single dendrite of AZ91D alloy. Permanent mold castings of AZ91D alloy were produced and sampled for optical metallographic examinations, and the simulated results were compared with the metallographic results.

Info:

Periodical:

Materials Science Forum (Volumes 654-656)

Main Theme:

Edited by:

Jian-Feng Nie and Allan Morton

Pages:

1516-1519

DOI:

10.4028/www.scientific.net/MSF.654-656.1516

Citation:

L. Huo et al., "Three-Dimensional Modeling and Simulation of Dendrite Morphology of Cast Mg Alloys", Materials Science Forum, Vols. 654-656, pp. 1516-1519, 2010

Online since:

June 2010

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Price:

$35.00

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