1. Thomas WM, Nicholas ED, Needham JC, Murch MG, Templesmith P, Dawes CJ: ‘Improvements relating to friction welding’, International patent no. PCT/GB92/02203, WO/1993/010935, 1992.
2. Welding of airframes using friction stir
3. Recent development in aluminium alloys for aerospace applications
4. Wang XL, Feng Z, David SA, Spooner S, Hubbard CR: Proc. 6th Int. Conf. on ‘Residual stresses’, 1408; 2000, London, IOM Communications.
5. Friction stir welding and processing