1. W. M. Thomas, E.D. Nicholas, J.C. Needham, M.G. Murch, P. Temple-Smith, and C. J. Dawes., 1991. Friction stir butt welding, GB patent no. 9125978 8.
2. Friction stir welding of aluminum alloys;Threadgill;Int Mater Rev,2009
3. Heat input and temperature distribution in friction stir welding;Tang;Journal of Materials Processing and Manufacturing Science,1999
4. Properties of friction-stir-welded 7075 T651 aluminium;Mahoney;. Metallurgical and Materials Transactions A,1998
5. Processing property correlation in friction stir welds;Reynolds;Material Science Forum,2000