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Thixotropy of Semisolid Metals

Published online by Cambridge University Press:  15 February 2011

Andreas N. Alexandrou ,
Gilmer R. Burgos  and
Vladimir M. Entov
Andreas N. Alexandrou
Affiliation:
Semisolids Processing Laboratory, Metals Processing Institute, WPI, Worcester, MA. 01609
Gilmer R. Burgos
Affiliation:
Semisolids Processing Laboratory, Metals Processing Institute, WPI, Worcester, MA. 01609
Vladimir M. Entov
Affiliation:
Institute for Problems in Mechanics of Russian Academy of Science, pr. Vernadskogo, 101, 117526, Moscow, Russia
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Abstract

Understanding the time-dependent flow behavior of metal alloys in semisolid state is essential for the further development of the process. In the present investigation, the thixotropic behavior of semisolid slurries is modeled using conservation equations and the Herschel-Bulkley fluid model. The rheological parameters are assumed to be functions of the solid volume fraction, and of a structural parameter that changes with processing history. The evolution of the structural parameter is described by a first order kinetic differential equation that relates the rate of build-up and break-down of the solid skeleton. The model is implemented into a computer code to predict die filling.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 578: Symposia A/C – Multiscale Phenomena in Materials - Experiments in Modeling , 1999 , 475
Copyright
Copyright © Materials Research Society 2000

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References

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