The Design of A Rheological Model for Semisolid Metal Slurries

Abstract

Abstract An improved rheological model is obtained to perfect the formula of agglomeration, deagglomeration and stacking mode of particles based on a previous model with the experimental data and statistical mechanics. It is believed that the time evolution of the microstructure determines the rheological behaviour of semisolid metal (SSM), and the effective solid volume fraction connect them perfectly. The new model can describe the time-dependent and time- independent rheological behaviour under a uniform theory. Then, the study on AlSi4Mg2 alloy shows that the predicted apparent viscosity agrees well with the experimental results. The correlation between the apparent viscosity and its microstructure is also identified. This verifies the reliability of the present model.