**3. Welded Joint Analysis**

This section describes the mechanical and microstructural analysis of the welded joint. This includes the use of the tensile test machine, microstructure analysis, bending test, and scanning electron microscope (SEM). It should be noted that the friction stir welded joint had start, middle, and end points. The specimens were all labeled A, B, and C. Label A indicated the specimens cut at the beginning of the joint, specimens cut in the middle were labeled B, while C symbolized the specimens cut at the end of the joint. This format was followed throughout the performance of the tests.
