Highest FSW joints properties versus FSW process stability: the role of surface preparation, FSW tool geometry and FSW process parameters
- Steiger H. ,
- Schwalm M. and
- Palm F.
- Steiger H. ,
- Schwalm M. and
- Palm F.
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An experimental study was carried out to investigate the properties of FSW joints in AA-6056 aluminium alloy, looking at the effects of surface preparation, tool geometry and welding speed and the correlation between these factors. FSW was carried out on AA-6056-T4 aluminium alloy (Al, 1%Si, 0.9%Mg, 0.85%Cu) plates of thickness 6.25 mm. Three different surface preparation methods (pickling, pickling and brushing, pickling and dry milling), two different pin tool geometries and two different welding speeds were used. Some specimens were also aged to T6 conditions. Samples were subjected to metallographic examination and testing to determine tensile and fracture toughness properties. The consistency of weld properties achieved is discussed, including the unexplained problem of bad (cold) bonding in the stirred zone.
4th International Symposium, 14-16 May 2003, Session 7: Process & Equipment 3, Paper 02
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