Rheological Behavior of Semisolid AlSi6Mg2 Alloy at Transient State

Li Ping Ju; Ying Wu; En Sheng Xu; Wei Wang; Hong Chao Luo

doi:10.4028/www.scientific.net/AMM.217-219.369

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 217-219Rheological Behavior of Semisolid AlSi6Mg2 Alloy...

Rheological Behavior of Semisolid AlSi6Mg2 Alloy at Transient State

Abstract:

In the present work, basing on the rheological model of Chen and Fan [1], the rheological behavior of AlSi6Mg2 alloy at transient state is investigated. It has been shown that the deagglomeration of particles is about two orders of magnitude faster than the agglomeration of them. The inequality of agglomeration rate and deagglomeration rate is thought as the origin of the thixotropy of SSMS. Subsequently, the similar trend of the variation of the viscosity and the average agglomerate size with shearing time and resting time shows that the microstructure of SSMS determines its rheological behavior, while the external flow conditions (such as shear rate, shearing time, etc) influence the viscosity by changing its microstructure. The present study predicts that the CF model can describe reliably the transient rheological behavior of AlSi6Mg2 alloy.

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Periodical:

Applied Mechanics and Materials (Volumes 217-219)

Pages:

369-372

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.217-219.369

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Online since:

November 2012

Authors:

Li Ping Ju, Ying Wu, En Sheng Xu, Wei Wang, Hong Chao Luo

Keywords:

Microstructure, Modeling, Semisolid Metal Slurries (SSMS)

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References

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