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

作　　者：Shuai Tan Feiyan Zheng Juan Chen Jingyu Han Yujuan Wu Liming Peng 

机构地区：[1]National Engineering Research Center of Light Alloy Net Forming,State Key Laboratory of Metal Matrix Composite,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Journal of Magnesium and Alloys》2017年第1期56-63,共8页镁合金学报（英文）

基　　金：National Science Foundation of China(No.51401125);Shanghai Pujiang Program(No.15PJ1403200);The Special Fund of Jiangsu Province for the Transformation of Scientific and Technological Achievements(BA2016039);Program of Shanghai Subject Chief Scientists(No.14XD1425000).

摘　　要：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)alloy joints were examined.Various tool rotation and travel speeds were adopted to prepare the joints.The analysis of temperature field indicates that the peak temperature for each sample can reach 450℃,which exceeds the eutectic reaction temperatures of 437℃ and 450℃ according to the binary phase diagram of Al–Mg system.The fierce intermixing can be found at the interface between Al and Mg alloys,forming the intermetallic of Al_(3)Mg_(2).Welds with the rotation speed of 900 rpm and travel speed of 120 mm/min display the highest tensile shear failure load of about 2.24 kN.The value was increased by 13%after the sample was heat treated at 400℃ for 0.5 h.

关 键 词：Friction stir lap linear welding(FSLW) Temperature field Tensile shear test Heat treatment 

分 类 号：TG1[金属学及工艺—金属学]