Assessment of rapid refill FSSW for 6111-T4 aluminium automotive alloys
- Al-Zubaidy B.M. ,
- Chen Y.C. and
- Prangnell P.
- Al-Zubaidy B.M. ,
- Chen Y.C. and
- Prangnell P.
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Description
A refill friction stir spot welding (RFSSW) process with a short welding cycle time was employed to fabricate welded joints in thin gauge AA 6111-T4 aluminium alloy sheets (thickness 0.9 mm) and the mechanical properties of the joints were investigated. RFSSW was conducted using a non-consumable tool (comprising clamping ring, sleeve and pin) at rotational speeds of 1500-2500 rpm and welding cycle times of 0.5-2 s to study the effect of different heat input conditions and to achieve defect free joints. Mechanical properties were characterised by microhardness profile measurement and lap-shear tensile testing. The joining mechanism is discussed with respect to the influence of tool rotational speed and welding time on joint performance, fracture path and welding thermal cycle.
10th International Symposium, 20-22 May 2014, Session 6A: FSSW II, Paper 05
Subjects
- Friction welding
- Welding
- Process
- Friction stir spot welding
- Aluminium and Al alloys
- Nonferrous
- Material
- 6xxx Al series
- Weld zone
- Weld
- Dynamically recrystallised zone
- Mechanical properties
- Properties
- Hardness
- Strength
- Shear strength
- Fracture
- Thermal properties
- Process conditions
- Ultimate tensile strength
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