Effects on the As-cast Structure of 7075 Aluminum Alloy by Treating with Electrical Pulse Inoculation

This paper investigates the influence of electrical pulses inoculation and Al-5Ti-B on the as-cast structure of 7075 aluminum alloy. The experimental results indicate that the number of the secondary branch crystal of the solidification structure is effectively controlled, and the feature of as-cast structure achieve the equiaxial and spherical grains after the liquid 7075 Al-alloy was treated by electrical impulse inoculation and Al-5Ti-B. Compared with these samples treating without electrical impulse inoculation, the segregation of Cu and Fe is restrained to a certain extent too. Some primary refinement mechanisms analyze those effects on the solidification structure by treating with electric pulse and Al-5Ti-B; this experiment may provide a theoretical reference for the application of electric impulse in 7075 aluminum alloy.