Investigation on the fatigue fracture characteristics between friction-stir welded aluminium overlap joints with different alloys and tools
- Gariepy A. ,
- Nadeau F. ,
- Gambou-Bosca A. ,
- et al
- Gariepy A. ,
- Nadeau F. ,
- Gambou-Bosca A. and
- Gregoire H.
Links
Repository
Description
Dissimilar overlap joints between different aluminium alloys were fabricated by friction stir welding (FSW) and the influence of alloy composition and FSW tool type on fatigue fracture, microstructure and mechanical properties was investigated. The materials studied were AA 5083-SPF or AA 7075-T6 for the top sheet (thickness 2 mm) and AA 6005 or AA 6061 for the bottom extrusion (thickness 2.8-3.5 mm). The tool types were "MX Triflute" and "Flared Whisk Triflute". Welding was performed at a rotational speed of 800-1250 rpm and a travel speed of 600-1500 mm/min. Force controlled high-cycle fatigue testing was conducted in a single lap shear configuration. Microstructures were observed by optical microscopy and electron backscatter diffraction. Mechanical properties were characterised by Vickers micro-indentation hardness measurements. Finite element analyses were used to quantify the relative hooking severity in each stackup. Fatigue failure modes were determined to establish process-microstructure-properties correlations.
12th International Symposium, 26-28 Jun 2018, Session 5B: Joint Interfaces, Paper 01
Subjects
- Aluminium and Al alloys
- Nonferrous
- Material
- 6xxx Al series
- 7xxx Al series
- 5xxx Al series
- Dissimilar materials
- Friction welding
- Welding
- Process
- Friction stir welding
- Fracture
- Properties
- Cracking
- Defects
- Fatigue cracks
- Strength
- Mechanical properties
- Fatigue strength
- Hardness
- Process equipment
- Friction stir welding tools
- Process conditions
- Microstructure
- Computation
- Weld zone
- Weld
- Thermomechanically affected zone
Related Records
