Effects of weld tool design and welding parameters on swept friction stir spot welding in thin gage aluminum
- Tweedy B.M. ,
- Widener C.A. ,
- Jurak S.F. ,
- et al
- Tweedy B.M. ,
- Widener C.A. ,
- Jurak S.F. and
- Burford D.A.
Repository
Description
Following a description of the swept FSW spot welding process, experimental work on welding conditions is presented. A design of experiments (DOE) approach was employed to examine the effect of process parameters on unguided lap shear tensile strength, morphology and microhardness in similar and dissimilar joints of 7075-T6 and 2024-T3 aluminium alloys fabricated by swept friction stir spot welding. Sheet specimens (thickness 1 mm) were tested in a single spot lap shear configuration. Four pin tool designs based on "Trivex", "Counterflow" or "Psi" probe geometries were studied, and for each design a Box Behnken DOE methodology was used to investigate the significance of process parameters (spindle speed, forge force, travel speed and lead angle). The relationships between tool design, process parameters, and weld Vickers microhardness and average tensile strength are discussed.
7th International Symposium, 20-22 May 2008, 11A: Spot 3 (Al), Paper 01
Subjects
- Friction welding
- Welding
- Process
- Friction stir spot welding
- Aluminium and Al alloys
- Nonferrous
- Material
- 7xxx Al series
- 2xxx Al series
- Dissimilar materials
- Process equipment
- Friction stir welding tools
- Process conditions
- Microstructure
- Strength
- Mechanical properties
- Properties
- Ultimate tensile strength
- Shear strength
- Hardness
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