Modeling and Simulation of Microstructure Evolution of Cast Mg Alloy

Liang Huo; Zhi Qiang Han; Bai Cheng Liu

doi:10.4028/www.scientific.net/MSF.638-642.1562

Paper Titles

Mechanical Properties of Large-Scale Extruded Mg-Zn-Y Alloys
p.1541

Microstructure and Creep Properties of AJ62 and AE44 Die-Casting Magnesium Alloys
p.1546

Creep Behaviour of AE42 Magnesium Alloy and its Composites Using Impression Creep Technique
p.1552

Effect of Rare Earth Element on Microstructure and Mechanical Properties of Mg-Sn-Ca Alloys
p.1558

Modeling and Simulation of Microstructure Evolution of Cast Mg Alloy
p.1562

Formability of AZ31 Alloys Prepared by Hot-Extrusion of their Machined Chips
p.1569

Inhomogeneous Deformation Observed Using High-Precision Markers Drawn by Electron Beam Lithography in a Magnesium Alloy with LPSO Phase
p.1574

Cross-Sectional Geometry and the Intermetallics Structure in a High Pressure Die Cast Mg-Al Alloy
p.1579

Atomic Scale Simulation of Deformation in Magnesium Single Crystals
p.1585

HomeMaterials Science ForumMaterials Science Forum Vols. 638-642Modeling and Simulation of Microstructure...

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.

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Periodical:

Materials Science Forum (Volumes 638-642)

Pages:

1562-1568

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.638-642.1562

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Online since:

January 2010

Authors:

Liang Huo, Zhi Qiang Han, Bai Cheng Liu

Keywords:

Cellular Automaton Method, Hexagonal Mesh, Mg Alloy, Microstructure, Numerical Simulation

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