Modeling of semi-soHid A356 alloy under upsetting process

摘要

The flow behavior of a semi-solid A356 alloy at high solid fraction was studied. Th mushy zone was considered as an effective two-phase, so that the solid continuum can b compressible porous media, and the liquid phase interaction with the solid skeleton was of Dare type. The semi-solid flow through the upsetting test was modeled in ABAQUS finite elemer method software. The Gurson yield criterion has been developed for the modeling process of th flow behavior of solid porous medium. Specimens were globulized by a thermomechanical proces and then were tested for various percentages of upsetting. The distribution of solid fraction alon the radius of the specimens at different height reduction showed a good correlation with modi prediction