Material flow has a significant impact on the joint properties and is one of the most challenging aspects to be understood in dissimilar friction stir welding. The present study emphasizes the role of process parameters on material flow, mechanical properties and corrosion behavior of dissimilar friction stir welds of AA5083-AA6061. Microstructural analysis revealed that the onion ring sub-layer width observed at the stir zone was substantially changed by varying process parameters. It was understood that the higher rotational speeds promote better intermixing and enhanced mechanical properties. The notch tensile strength values were in correlation with the intermixing of materials at the stir zone and the highest notch tensile strength value was obtained at 1400 rpm and 60 mm/min. A remarkable degree of material intermixing and fragmentation of intermetallics at higher rotational speeds resulted in better corrosion resistance.

材料流动对接头性能有重大影响，是异种搅拌摩擦焊中需要理解的最具挑战性的方面之一。本研究强调了工艺参数对 AA5083-AA6061 异种搅拌摩擦焊缝的材料流动、机械性能和腐蚀行为的作用。显微结构分析表明，在搅拌区观察到的洋葱圈子层宽度因工艺参数的变化而发生显着变化。据了解，较高的转速促进更好的混合和增强的机械性能。缺口拉伸强度值与搅拌区材料的混合相关，在 1400 rpm 和 60 mm/min 时获得最高缺口拉伸强度值。