1. Metals Handbook. 9th ed. Metals Park, Ohio: ASM international; 1979.
2. W.M.Thomas, E.D. Nicholas, J.C. Needham, M.G. Murch, P. Temple-Smith, C.J. Dawes, “Friction stir butt welding”: UK, International patent application no. PCTPGB92P02203 and GB patent application (no. 9125978. 8, 6 December 1991).
3. Properties of friction-stir-welded 7075 T651 aluminum