LAUSR

In this study, Al-7Si-4Zn-3Cu alloy was processed by multi-directional forging (MDF) at 3, 6 and pass corresponding one, two and three cycle, respectively. The structural and mechanical properties of the alloys were investigated at as-cast, homogenised and MDF states. The MDF resulted in a severely deformed and refined microstructure with eliminated casting defects like micro-porosity and formation of nearly homogeneous distributed finer silicon particles. The tensile (UTS) and yield (YS) of the alloy increased up to two cycle, above which they showed a decrease, while the percent elongation increased continuously as the cycle number increased. The comprehensive strength and micro and macro hardness of the alloy decreased with increasing MDF cycles. The results were evaluated according to microstructural changes depending on MDF cycles.