Effects of process parameters on microstructure and mechanical properties of friction stir lap linear welded 6061 aluminum alloy to NZ30K magnesium alloy

• DOI: 10.1016/j.jma.2016.11.005
• Publication Date: 2016-12-22T11:31:58Z
• Authors: Shuai Tan; Feiyan Zheng; Juan Chen; Jingyu Han; Yujuan Wu; Liming Peng
• Keywords: Friction Stir Welding

The microstructures and lap-shear behaviors of friction stir lap linear welded as-extruded 6061 Al alloy to as-cast Mg–3.0Nd–0.2Zn–0.7Zr (wt.%) (NZ30K) joints were examined. Various tool rotation travel speeds adopted prepare the joints. analysis temperature field indicates that peak for each sample can reach 450 °C, which exceeds eutectic reaction temperatures 437 °C according binary phase diagram Al–Mg system. fierce intermixing be found at interface between Mg alloys, forming intermetallic Al3Mg2. Welds with speed 900 rpm 120 mm/min display highest tensile shear failure load about 2.24 kN. value was increased by 13% after heat treated 400 0.5 h.