Hossein Alimardan - M.Sc. Stusent of Research and Scinences Branch of Kermanshah, Islamic Azad Univesity
- Sahebali - Shahroud Branch, Islamic Azad Univesity
Jamal Seidi - Ilam Branch, Islamic Azad Univesity

In this study, the effect of temperature on the diffusion welding of AZ۳۱ magnesium alloy and ۷۰۷۵ aluminum was discussed. Diffusion welding temperature was the most important parameter since all mechanisms are sensitive to temperature in Diffusion welding method. Intrusive contacts between the two alloys at temperatures of ۴۳۰, and ۴۴۰ °C ۴۵۰ and took ۶۰ min. In all tests constant pressure and vacuum, respectively ۲۹ MPa and ۱×۱۰-۳ torr were considered. Interface connections using Scanning Electron Microscope (SEM) equipped with EDS analysis was conducted to evaluate the mechanical properties of joints as well as a survey of microhardness and shear strength tests were analyzed. As a result of the presence of intermetallic compounds and Al۳Mg۲ Al۱۲Mg۱۷ binding was observed in the weight of these compounds increased with increasing temperature.