Eutectic Phase

This example demonstrates how to simulate the formation of the eutectic phase by using the diffuse phase model. Here, a two-dimensional simulation of equiaxed solidification of a Al-Si-Mg alloy is shown. One fcc-Al grain is placed in the 2D simulation region at the beginning. The eutectic (Si) phase is treated as a continuous phase mixture by activating unresolved option for generation of new Si grains.

Alloy

Example	A015_AlSiMg_Unresolved
Alloy system	Al-Si-Mg (AlSiMg.GES5)
Composition	92.7 wt% Al 7.0 wt% Si 0.3wt% Mg

Simulation conditions

Example	A015_AlSiMg_Unresolved
Dimension	2-D
Grid size	300x300 cells
Grid spacing	1 micron
Interface thickness	3 cells
Boundary conditions	Phase/Concentration field east = periodic west = periodic top = periodic bottom = periodic

Results

Solidification sequence	Si concentration	Grain growth
$t = 0\,{\rm s}$
$t = 8\,{\rm s}$
$t = 8.5\,{\rm s}$
$t = 14\,{\rm s}$
$t = 18.5\,{\rm s}$

Phases

Interface	Liquid	fcc-Al	Eutectic (Si)	Mg2Si
$-1$	$0$	$1$	$2$	$3$

Files

• A015_AlSiMg_Unresolved