Ghiasvand Amir, Noori Saja Mohammed, Suksatan Wanich, Tomków Jacek, Memon Shabbir, Derazkola Hesamoddin Aghajani
Department of Mechanical Engineering, University of Tabriz, Tabriz 5166616471, Iran.
Department of Computer Network, College of Engineering and Computer Science, Lebanese French University, Erbil 44001, Iraq.
Materials (Basel). 2022 Mar 27;15(7):2463. doi: 10.3390/ma15072463.
Friction Stir Welding (FSW) is a solid-state bonding technique. There are many direct and indirect factors affecting the mechanical and microstructural properties of the FSW joints. Tool offset, tilt angle, and plunge depth are determinative tool positioning in the FSW process. Investigating the effect of these factors simultaneously with other parameters such as process speeds (rotational speed and translational speed) and tool geometry leads to a poor understanding of the impact of these factors on the FSW process. Because the three mentioned parameters have the same origin, they should be studied separately from other process parameters. This paper investigates the effects of tilt angle, plunge depth, and tool offset on Ultimate Tensile Stress (UTS) of joints between AA6061-T6 and AA7075-T6. To design the experiments, optimization, and statistical analysis, Response Surface Methodology (RSM) has been used. Experimental tests were carried out to find the maximum achievable UTS of the joint. The optimum values were determined based on the optimization procedure as 0.7 mm of tool offset, 2.7 degrees of tilt angle, and 0.1 mm of plunge depth. These values resulted in a UTS of 281 MPa. Compared to the UTS of base metals, the joint efficiency of the optimized welded sample was nearly 90 percent.
搅拌摩擦焊（FSW）是一种固态连接技术。有许多直接和间接因素会影响搅拌摩擦焊接头的力学性能和微观结构性能。工具偏移量、倾斜角度和 plunge深度是搅拌摩擦焊过程中决定性的工具定位参数。将这些因素与诸如工艺速度（转速和平移速度）和工具几何形状等其他参数同时进行研究，会导致对这些因素对搅拌摩擦焊过程的影响理解不足。由于上述三个参数有相同的来源，它们应与其他工艺参数分开研究。本文研究了倾斜角度、plunge深度和工具偏移量对AA6061-T6和AA7075-T6之间接头的极限拉伸应力（UTS）的影响。为了设计实验、进行优化和统计分析，采用了响应面法（RSM）。进行了实验测试以找出接头可达到的最大UTS。根据优化程序确定的最佳值为0.7毫米的工具偏移量、2.7度的倾斜角度和0.1毫米的plunge深度。这些值导致UTS为281兆帕。与母材的UTS相比，优化焊接样品的接头效率接近90%。
