1. Thomas W M, Nicholas J C,et al. Friction Stir Butt Welding. International patent application, No. PCT/GB92/02203 and GB patent application, No. 9125978.8, 1991.
2. Rhodes C G, Mahoney M W,et al. Effect of Friction Stir Welding on Microstructure of 7075 Aluminum.Scripta Materialia, 1997, 36(1):69–75
3. Dawes C J, Thomas W M. Friction Stir Process Welds Aluminum Alloys.Welding Journal (Miami, Fla), 1996, 75(3):41–45
4. Dawes C J. Introduction to Friction Stir Welding and Its Development.Welding and Metal Fabrication, 1995, 63(1):13–15
5. Steward W W. Welding of Airframes Using Friction Stir.Air & Space Furop, 2001, 3(3/4):64–66