Mechanical properties and flow behavior of pinless friction stir spot welded joint of 2024 aluminum alloy
- Yang X.W. ,
- Li W.Y. ,
- Zhang Z.H. ,
- et al
- Yang X.W. ,
- Li W.Y. ,
- Zhang Z.H. ,
- Gao D.L. ,
- Wang W.B. and
- Luan G.H.
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Description
A pinless tool with involute grooves on its shoulder surface was designed to facilitate friction stir spot welding (FSSW) of 2024-T3 aluminium alloy (Al, 3.8-4.9%Cu, 1.2-1.8%Mg, 0.3-0.9%Mn) sheets (thickness 1.5 mm) and the influence of process parameters (rotational speed, plunge rate and dwell time) on the formability and mechanical properties of the welded joints was investigated. FSSW experiments were conducted at rotational speeds of 600-1500 rpm and plunge rates of 10-50 mm/min. Cross-sectional microstructure was examined by optical microscopy. Mechanical properties were characterised by Vickers hardness measurements in the nugget zone, thermomechanically affected zone and HAZ, tensile-shear tests and SEM fracture morphology observations. Flow behaviour of the weld metal was also studied.
10th International Symposium, 20-22 May 2014, Session 6A: FSSW II, Paper 04
Subjects
- Friction welding
- Welding
- Process
- Friction stir spot welding
- Aluminium and Al alloys
- Nonferrous
- Material
- 2xxx Al series
- Process equipment
- Friction stir welding tools
- Process conditions
- Mechanical properties
- Properties
- Hardness
- Microstructure
- Weld zone
- Weld
- Dynamically recrystallised zone
- HAZ
- Thermomechanically affected zone
- Strength
- Ultimate tensile strength
- Shear strength
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