Friction stir spot welding: principal parameters and their effects
- Addison A.C. and
- Robelou A.J.
- Addison A.C. and
- Robelou A.J.
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Description
A study was conducted to assess friction stir spot welding (FSSW), to identify and investigate the effects of the principal FSSW parameters and to investigate the effectiveness of common friction stir welding (FSW) tool designs when used for FSSW. Aluminium alloy AA6061-T4 sheets, 2 mm thickness, were used. All welds were made in the overlap configuration. The parameters studied were tool plunge feed rate, spindle rotation speed, tool plunge depth, and combined rotary and orbital motion. Three probes were used: plain threaded probe with domed tip, MX-Triflute probe with 45 degree right hand flute angle, and flared Triflute probe with a 7 degree flare angle on the flutes and a whisk feature on the tip. Weld appearance, macrostructure and strength were determined. TWI's Com-Stir process is introduced, a variant of FSW where rotational and orbital motion of the tool during welding are combined, and results obtained using this process were determined also.
5th International Symposium, 14-16 Sep 2004, Session 11A: Friction Stir Spot Welding and Modelling, Paper 01
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