This work reports the characterization of AA6061/SiC/FA hybrid composites joined using friction stir welding (FSW). FSW was conducted by employing various tool pin profiles such as straight cylindrical (SC), tapered conical, straight square (SS) and cylindrical threaded. Microstructure and mechanical characteristics of joints were investigated using these tool pin profiles. Microstructure study of the weld joints was carried out through scanning electron microscopy and electron backscattered diffraction (EBSD) analysis. The results show equiaxed distribution of grains in the nugget zone. EBSD analysis indicates that the average grain size reduces to 3 µm after FSW with the presence of high-angle grain boundaries. Higher joint efficiency (85%) is obtained for joints obtained using SS tool pin compared to their counterparts, and SC tool yields minimum joint efficiency (77%). Overall 8% enhancement of the joint efficiency is achieved using SS tool pin profile.

这项工作报告了使用摩擦搅拌焊（FSW）连接的AA6061 / SiC / FA杂化复合材料的特性。通过使用各种工具销轮廓来进行FSW，例如直圆柱（SC），锥形圆锥，直方形（SS）和圆柱螺纹。使用这些工具销轮廓研究了接头的微观结构和机械特性。通过扫描电子显微镜和电子背散射衍射（EBSD）分析进行了焊接接头的显微组织研究。结果表明，金块区域内的晶粒等轴分布。EBSD分析表明，FSW后，由于存在高角度晶界，平均晶粒尺寸减小至3 µm。使用SS工具销获得的接头与对应的接头相比，可获得更高的接头效率（85％），SC工具产生最小的联合效率（77％）。使用SS工具销轮廓可将接头效率整体提高8％。