ABSTRACT
Advanced granular modeling has been developed to describe the Non-Newtonian viscous behavior of the powder-binder compound in the metal injection molding. The powder size and shape distribution is directly considered into the granular modeling. Hence, the apparent viscosity of powder-loaded binder mixture is predicted with successful agreement with the experimental data. The effect of powder size and shape on the Non-Newtonian viscosity can be evaluated with comparison to the reported experimental results. In addition, the present modeling helps us to understand the anormal phenomena in the metal injection molding. The dimpling behavior is employed for analysis to discuss the influence of the powder volume fraction and powder shapes on the pattern formation.
