ABSTRACT

The proposed study deals with the joining of AA6061 T6 alloy using a novel geometric square wave tool path pattern for adequate mixing of materials with increased stirring time and enlargement of the deformation zone. Experiments were conducted based on the process parameters to imply the stirring effect like rotation speed 1200 rpm, weaving rate 100 mm/min; and specific step sizes (1.0, 1.5, and 2.0 mm). Results show that the Percentage of variation for achieving the higher tensile strength of 11.3%, micro vickers hardness of 12.8% with a step size of 1 mm compared to the linear weldment. The SEM morphologies of the weldment clarify the formation of IMCs like spheroidal cementite with the zeolitic structure for resulting in higher hardness value. The EDAX results confirm the formation of intermetallic precipitates like Mg₂Si that leads the precipitation hardening and grain boundary strengthening.

摘要

拟议的研究涉及使用新颖的几何方波工具路径模式连接 AA6061 T6 合金，以便在增加搅拌时间和扩大变形区的情况下充分混合材料。根据工艺参数进行实验，以暗示搅拌效果，如转速1200 rpm，织造速度100 mm/min；和特定的步长（1.0、1.5 和 2.0 毫米）。结果表明，与线性焊件相比，在步长为 1 mm 的情况下，实现 11.3% 的更高抗拉强度、12.8% 的显微维氏硬度的变化百分比。焊件的 SEM 形貌表明 IMC 的形成，如具有沸石结构的球状渗碳体，从而产生更高的硬度值。EDAX 结果证实了金属间析出物如 Mg 的形成₂ Si 导致析出硬化和晶界强化。