Defect formation during dissimilar aluminium friction stir welded T-joints Mubeen Ali, Saquib Anjum, Arshad Noor Siddiquee, Zahid A. Khan, Xizhang Chen, Sergey Konovalov, Aisha Anjum, Shafquat Shakeel and Hashmatullah Ibrahimi Mechanics & Industry, 21 2 (2020) 205 Published online: 07 February 2020 DOI: 10.1051/meca/2020005