The current research aims in evaluating the 3D temperature distribution of the friction stir–welded plates of AA1100 alloy by using a 9-point finite difference method (FDM). The isotherms, surface plots, and temperature profiles have been obtained from the FDM to analyse the distribution of temperature and compare them with the experimental results. Microstructure analysis, residual stress distribution, and tensile test have been conducted to determine the joint quality that strongly depends on the amount of heat generation which again is governed by the processing parameters. All the weld specimens exhibited an increase in tensile strength by 20% than that of the base metal. The microstructural study clearly indicates the grain refinement in the weld nugget. Residual stress measurement of the weld showed compressive nature of the stress in the joint and tensile nature below the tool shoulder region. This welding process finds various applications in the automotive industries as the need for better structural performance in the joining components of several vehicles and ship building parts is highly expected.

目前的研究旨在通过使用 9 点有限差分法 (FDM) 评估 AA1100 合金搅拌摩擦焊板的 3D 温度分布。从 FDM 中获得了等温线、表面图和温度曲线，以分析温度分布并将它们与实验结果进行比较。已经进行了微观结构分析、残余应力分布和拉伸试验，以确定在很大程度上取决于热量产生量的接头质量，而热量产生量又受加工参数控制。所有焊缝试样的抗拉强度均比母材提高 20%。显微组织研究清楚地表明焊接熔核中的晶粒细化。焊缝的残余应力测量显示了接头中应力的压缩性质和工具肩部区域下方的拉伸性质。这种焊接工艺在汽车工业中得到了广泛的应用，因为人们高度期望在几种车辆和造船部件的连接部件中需要更好的结构性能。