“…With the improvement in the requirements for lightweight structural materials in the aerospace industry, Al-Cu-Li alloys with excellent comprehensive properties such as low density, high elastic modulus, and high specific strength are considered as ideal materials for the manufacture of space launch vehicles with rib-ring cylinders (Rioja et al, 2012;Ahmed and Wu, 2013;Dursun and Soutis, 2014;Yu et al, 2015;El-Aty et al, 2018;Zhang et al, 2018). At present, composite spinning-extrusion (CSE), which combines the advantages of both spinning and extrusion processes, is considered as a new method for the integral formation of ribbed ring cylinders (Domack and Wangner, 2015;Tayon et al, 2019).…”