Dahham Younis, Alaa, Anmar Musaid Al-Nuaimi, Ziad Shakeeb Al Sarraf, and Muhsin Mahmood Hamdoon. 2024. “The Effect of Periodic Friction and Upsetting Pressure on Rotary Friction Welding Process”. Al-Rafidain Engineering Journal (AREJ) 29 (2):65-75. https://doi.org/10.33899/arej.2024.145510.1316.