Authors : Majid Shirinabadi Farahani and Mehdi Divandari
Abstract: In this research, the effect of interlayer thickness of pure Zn on pure Al and Mg joint with lap joint form of welded top Mg with FSW welding process was investigate. The assumption considered: tool rotation speed 1600 rpm, welding speed was 40 mm min–1 and all of weld parameters was constant, pure Zn interlayer with three thickness were 400, 200 and 100 μ, respectively. Welded specimens were examined microscopically (optical microscope, SEM, EDS) and macroscopically and XRD processes. Microstructure analysis shown that complex structure composed of Al and Mg layer was obtained in the interface of joint and Mg-Al-Zn solidified and eutectic structures are visible. There is MgZn2 intermetallic compound in the Mg and Zn interface and weld 2 zone. The weld shear tensile strength has increase by reduction of Zn interlayer thickness. The maximum weld shear tensile strength with interlayer pure Zn thickness 100 μ was 76 N mm–2. The weld zone micro hardness was much more than two base metals.
Majid Shirinabadi Farahani and Mehdi Divandari, 2016. Effect of Zn Interlayer on Microstructure and Mechanical Properties of Dissimilar Al/Mg Weld by FSW. International Journal of Signal System Control and Engineering Application, 9: 86-96.