Affiliation: | a School of Materials and Engineering, Northwestern Polytechnical University, Xi’an 710072, People’s Republic of China b Department of Mechanical and Industrial Engineering, Ryerson University, Toronto, Ontario M5B 2K3, Canada c China FSW Center Beijing FSW Technology Limited Company, Beijing 100024, People’s Republic of China d Shanghai Aerospace Equipments Manufacturer, Shanghai 200045, People’s Republic of China |