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Constitutive Behavior of Semi-Solid Metal Alloy Slurries

Published online by Cambridge University Press:  15 February 2011

Pratyush Kumar
Affiliation:
Department of Materials Science and Engineering Massachusetts Institute of Technology, Room 8-106 77 Massachusetts Avenue Cambridge, Massachusetts 02139
Christophe L. Martin
Affiliation:
Department of Materials Science and Engineering Massachusetts Institute of Technology, Room 8-106 77 Massachusetts Avenue Cambridge, Massachusetts 02139
Stuart Brown
Affiliation:
Department of Materials Science and Engineering Massachusetts Institute of Technology, Room 8-106 77 Massachusetts Avenue Cambridge, Massachusetts 02139
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Abstract

The constitutive flow behavior of semi-solid metal alloy slurries has been modeled using an internal variable framework. The formulation represents the primary flow response of these materials: history dependence (thizotvopy), steady state shear rate thinning (pseudoplasticity) and constant internal structure shear rate thickening (dilatancy). The flow response at any given structure has been decoupled from structure-dependent response in carefully controlled rapid transient experiments done on a computer-controlled, high temperature, Couette geometry rheomneter. The data for Sn-15wt%Pb correlates well with the model.

Type
Research Article
Copyright
Copyright © Materials Research Society 1993

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References

[1] Joly, P A and Mehrabian., R The rheology of a partially solid alloy. Journal of Materials Science, 11:13931418, 1976.Google Scholar
[2] Flemings., M C Behavior of metal alloys in the semisolid state. Metallurgical Transactions A, 22A:957981, May 1991.Google Scholar
[3] Kattammis, T Z and Piccone., T J Rheology of semii-solid AI-4.5%Cu-1.5%Mg alloy. Materials Science and Engineering, A131:265272, 1991.Google Scholar
[4] Joly., P A Rheological properties and structure of a semi-solid tin-lead alloy. PhD. Thesis, Department of Materials Science and Engineering, MIT, 1974.Google Scholar
[5] Frankel, N A and Acrivos., A On the viscosity of a concentrated suspension of solid spheres. Chemical Engineering Science, 22:847853, 1967.Google Scholar
[6] Kumar, P, Martin, C L, and Brown., S B Shear rate thickening flow behavior of senmi-solid slurries. Metallurgical Transactions (A), in press, 1993.Google Scholar
[7] Rice., J R. On the structure of stress-strain relations for time-dependent plastic deformation in metals. Journal of Applied Mechanics, September 1970:728737, 1970.Google Scholar
[8] Brown, S B, Kumar, P, and Dave., V R Very high homologous temperature constitutive models for senmi-solid and solid metals. Proceedings of the IUTAM Symposium on Mechanical Effects of Welding, 1991, Lulea, Sweden, 1991.Google Scholar
[7] Frost, H J and Ashby., M F Deformation Mechanics Maps. Pergamnon Press, 1982.Google Scholar