Influence of the dwell time on spot welding between 6008 Al alloy and steel by FSW
- Bozzi S. ,
- Etter A.L. ,
- Baudin T. ,
- et al
- Bozzi S. ,
- Etter A.L. ,
- Baudin T. ,
- Robineau A. and
- Goussain J.C.
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Description
To understand the influence of dwell time in friction stir welding (FSW) and thus to optimise its value, spot welds were produced between superposed sheets of 6008 aluminium alloy and industrial steel (thickness 2.5 and 2 mm, respectively), and their microstructural evolution, intermetallic compound formation, Vickers microhardness and tensile shear resistance were assessed. The FSW tool (4 mm length), comprising W, 25%Re alloy with steel shoulder, penetrated completely through the aluminium and partially into the steel sheet. Samples were characterised by optical microscopy, SEM/energy dispersive X-ray analysis and electron backscattered diffraction; intermetallics and cracking were examined. A mechanism of continuous dynamic recrystallisation was identified.
6th International Symposium, 10-13 Oct 2006, Session 13A: FSW Al-Steel/Cu, Paper 03
Subjects
- Friction welding
- Welding
- Process
- Friction stir spot welding
- Aluminium and Al alloys
- Nonferrous
- Material
- 6xxx Al series
- Ferrous
- Steels
- Dissimilar materials
- Process conditions
- Mechanical properties
- Properties
- Hardness
- Strength
- Ultimate tensile strength
- Shear strength
- Weld zone
- Weld
- Dynamically recrystallised zone
- Defects
- Cracking
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