Microstructure Simulation in Pressurized Solidification during Squeeze Casting of Aluminum Alloy A356

Motors Global Research and Development Center A mathematical model for describing the nucleation and dendrite growth in pressurized solidification during squeeze casting of aluminum alloy has been developed, where the thermal and mechanical dual effect on the nucleation in pressurized solidification...

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Bibliographic Details
Published in:AIP conference proceedings 2012-03
Main Authors: Li, Yanda, Han, Zhiqiang, Luo, Alan, Sachdev, Anil, Liu, Baicheng
Format: Article
Language:English
Subjects:
Alloy development
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Summary:Motors Global Research and Development Center A mathematical model for describing the nucleation and dendrite growth in pressurized solidification during squeeze casting of aluminum alloy has been developed, where the thermal and mechanical dual effect on the nucleation in pressurized solidification was taken into account. Cellular Automaton method was employed to simulate the dendrite growth during the squeeze casting process, where the solid-liquid interface growth kinetics was determined based on the interfacial equilibrium, i.e. the relationship of temperature, pressure, composition and interfacial tension. Experiments were carried out for an industrial aluminum alloy A356, where direct squeeze casting process was employed and specimens were produced under the atmospheric pressure and the pressures of 27, 82 and 123 MPa. The nucleation and dendrite growth were simulated with the developed model and the effect of pressure on the microstructure evolution of the casting was discussed based on the numerical simulation.
ISSN:0094-243X