The effect of SIMA process parameters on the crystallographic texture and microstructure of
7075 aluminum alloy was investigated. Specimens of 7075 were subjected to 10-55 % uniaxial
compression strain at ambient temperature and then semi-solid treatment was carried out at the
range of 600 to 620 °C for 5-35 min. The fiber textures of <110>║CD and <111>║CD were
dominant textures in compressed samples. The textures were transformed to a randomized
texture following the formation of equiaxed and globular grains. Intense segregation of Cu and
Si and appreciable depletion of Mg were observed at grain boundaries during soaking time. The
grain boundary composition approaches Al-Cu and Al-Si binary eutectics, which facilitates grain
boundary melting. Effects of temperature and strain on both the coarsening kinetics of solid
particles and the pinning of grain boundary liquid films are also discussed.