Deformation behavior and modeling of semi-solid Al-4Cu-Mg alloy

Effects of deformation temperature and strain rate on deformation behavior of semi-solid Al-4Cu-Mg alloy were investigated. The results show that deformation temperature and strain rate are significant effect on peak stress of Al-4Cu-Mg alloy rather than steady flow stress, which result from different deformation mechanism. At the beginning of compression, the deformation mechanism is liquid flow (LF) and flow of liquid incorporating solid particles (FLS). However, with the increasing of height reduction, sliding between solid particles (SS) and plastic deformation of solid particles (PDS) are dominating in the semi-solid compression. On basis of the experimental data of semi-solid Al-4Cu-Mg alloy, a model was established to describe the relationship between the processing parameters and flow stress, which shows good match with experimental data.