Abstract:The effect of prior compressive deformation, isothermal temperature and holding time on the structure of AZ61 magnesium alloy fabricated by strain-induced melt activation(SIMA) processing was investigated. The specimens were subjected under deformation ratios of 0%, 22% and 40% and various heat treatment time and temperature regions. The results indicate that the ideal technological parameters of semi-solid AZ61 alloy produced with non-dendrites are recommended as 22%(prior compressive deformation), 595℃(heat treatment temperature) and 40 min(time). The as-cast AZ61 magnesium alloy isn′t fit for semi-solid forming.

Key words: strain-induced melt activation(SIMA); AZ61 magnesium alloy; non-dendrites microstructure