Abstract
A mathematical model is proposed to represent the thixotropic behavior of semisolid slurries at high solid fractions (ƒs > 0.6), as occurs in dispersion-strengthened metal-matrix composite processing. The model assumes that the slurry behaves as a viscoplastic porous medium saturated with liquid phase and hardened or softened, depending on the shear rate and solid fraction. The model is validated by comparison of its predictions with a recent set of experimental data on Sn-Pb alloys.
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