Paper Title:
Modeling and Simulation of Microstructure Evolution of Cast Mg Alloy
  Abstract

A cellular automaton (CA) model has been developed for simulating the microstructure evolution and dendrite morphology of cast magnesium alloys. The growth kinetics of dendrite tips is determined by the difference between local equilibrium composition and local actual composition obtained by solving the solute transport equation. Two sets of meshes, a hexagonal mesh and an orthogonal mesh, are used in the model to perform the simulation. The hexagonal mesh is used to perform CA calculation to reflect the texture of Mg alloy dendrites, and the orthogonal mesh is used to solve the solute transport equations. The model was applied to simulate single dendrite evolution and columnar dendrites growth of AZ91D Mg alloy, as well as multi-grain growth of Mg-10Gd-2Y-0.5Zr (wt%) Mg alloy. Permanent mold step-shaped castings of the two Mg alloys were poured and metallographic examinations were carried out for validating the present model. The simulation results agree well with metallographic results. The model can be applied to simulate the microstructure evolution and dendrite morphology of magnesium alloys.

  Info
Periodical
Materials Science Forum (Volumes 638-642)
Main Theme
Edited by
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
Pages
1562-1568
DOI
10.4028/www.scientific.net/MSF.638-642.1562
Citation
L. Huo, Z. Q. Han, B. C. Liu, "Modeling and Simulation of Microstructure Evolution of Cast Mg Alloy", Materials Science Forum, Vols. 638-642, pp. 1562-1568, 2010
Online since
January 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Bin Li, Qing Yan Xu, Bai Cheng Liu
Abstract:A modified Cellular Automaton model was presented to simulate the evolution of dendritic microstructure in low pressure die casting of Al-Si...
1787
Authors: H. Wang, Q. Li
Abstract:A model based on the cellular automaton (CA) technique for the simulation of solidification microstructure has been developed. An improved...
271
Authors: Hsiun Chang Peng, Long Sun Chao
Abstract:Rather than designated directly as solid if the micromesh (or cell) larger than a nucleus is chosen as the nucleation site, the growth of a...
22
Authors: Liang Huo, Zhi Qiang Han, Bai Cheng Liu
Abstract:A three-dimensional (3-D) cellular automaton (CA) model for simulating the dendrite morphology of cast Mg alloys has been developed. In the...
1516
Authors: Heng Min Ding, Tie Qiao Zhang, Lv Chun Pu
Chapter 10: Alloys, Steel Materials and Technologies
Abstract:In the paper, a model basing on solute conservative in every unit is developed for solving the solute diffusion equation during...
870