Abbas, Abbas, and Hazim Abdulkadhum. 2019. “Effect of Shoulder–Workpiece Interference Depth on the Quality of Friction Stir Welding of AA7075-T6 Aluminium Alloy”. Association of Arab Universities Journal of Engineering Sciences 26 (1), 150-59. https://doi.org/10.33261/jaaru.2019.26.1.020.