INVESTIGATION OF FRICTION PRESSURE EFFECT ON WELDING QUALITY IN FRICTION STUD WELDING PROCESS . J. eng. sustain. dev. [Internet]. 2023 May 1 [cited 2024 Apr. 30];27(3):384-93. Available from: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1599