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Modelling of Phase Transformation During Homogenization of Ternary Aluminum Alloys

Published online by Cambridge University Press:  21 March 2011

Thorsten Hofmeister ,
Klaus Greven ,
Andreas Ludwig  and
Peter R. Sahm
Thorsten Hofmeister
Affiliation:
Foundry Institute, RWTH-Aachen, Germany
Klaus Greven
Affiliation:
Foundry Institute, RWTH-Aachen, Germany
Andreas Ludwig
Affiliation:
Foundry Institute, RWTH-Aachen, Germany
Peter R. Sahm
Affiliation:
Foundry Institute, RWTH-Aachen, Germany
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Abstract

The microstructure determines for the most part mechanical properties of castings. This is the case especially with age-hardening aluminum alloys. To predict the phase transformation in cast parts during and after solidification a sophisticated approach to a coupled modeling of various simulation phenomena is presented. This approach couples a diffusion equation solver which considers the online estimation of thermodynamic equilibria with a macroscopic model for temperature calculation. The coupled micro-model predicts the dendrite solidification of ternary alloys. To simulate the phase transformation in temperature zones below solidification a homogenization model is added. Permanent mould casting experiments with ternary aluminum alloys are used to validate these models.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 652: Symposium Y – Influences of Interface & Dislocation Behavior on Microstructure Evolution , 2000 , Y8.11
Copyright
Copyright © Materials Research Society 2001

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References

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