Peak temperature arising during the joining of metals by friction stir welding (FSW) needs to be investigated along with other process parameters of FSW to understand their inevitable impact on joint quality. This investigational and experimental analysis aims to determine the impact of pin geometry and its rotational speed by formulating thermic mechanical process-based models to anticipate peak temperature and to compare it with actual values. Three distinctive pin geometries rotated at three speeds were used while other parameters were unchanged. The fitness and suitability of the model were verified by comparing the anticipated values with the experimental values. Macrographic and micrographic observations revealed that flawless joints with improved mechanical properties were fabricated at a peak temperature of 616 K (80 % melting temperature) when a taper cylindrical pin with a rotational speed of 818 rpm was employed. In addition, SEM analysis of the fractured specimen confirmed that failure of the defect free weldment occurred in brittle mode, indicating that preferred fusion of grains and their constituents occurred during the joining process.

需要研究通过搅拌摩擦焊（FSW）连接金属时产生的峰值温度以及FSW的其他工艺参数，以了解它们对接头质量的不可避免影响。这项研究和实验分析旨在通过制定基于热机械过程的模型来预测峰值温度并将其与实际值进行比较，从而确定销钉几何形状及其转速的影响。使用了三种以三种速度旋转的独特的销钉几何形状，而其他参数保持不变。通过将预期值与实验值进行比较，验证了模型的适用性和适用性。宏观和显微观察发现，当使用旋转速度为818 rpm的锥形圆柱销时，在616 K（80％熔化温度）的峰值温度下可以制造出具有改善的机械性能的完美接头。此外，对断裂试样的SEM分析证实，无缺陷焊缝以脆性模式发生了破坏，表明在连接过程中发生了晶粒及其成分的优选融合。