Localised corrosion of friction stir welds in aluminium alloys
- Connolly B.J. ,
- Davenport A.J. ,
- Jariyaboon M. ,
- et al
- Connolly B.J. ,
- Davenport A.J. ,
- Jariyaboon M. ,
- Padovani C. ,
- Ambat R. ,
- Williams S.W. ,
- Price D.A. ,
- Wescott A. ,
- Goodfellow C.J. and
- Lee C.M.
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Description
The relationship between the friction stir weld (FSW) microstructure and local corrosion susceptibility of three aluminium alloy (2024-T351, 7010-T7651 and 5456-H116) plates (4.5-12.7 mm thickness) as well as a dissimilar 2024/7010 weld was investigated, and the use of laser surface melting treatments for corrosion mitigation was demonstrated. The corrosion behaviour was assessed via immersion corrosion testing, gel visualisation and a micro-electrochemical droplet cell method. Typical microstructures are presented for different regions (parent material, nugget, thermomechanically affected zone and HAZ), and the balance between anodic/cathodic reactivities is related to FSW processing parameters.
5th International Symposium, 14-16 Sep 2004, Session 3A: Metallurgy/Microstructure/Corrosion, Paper 01
Subjects
- Corrosion
- Properties
- Galvanic corrosion
- Friction welding
- Welding
- Process
- Friction stir welding
- Aluminium and Al alloys
- Nonferrous
- Material
- 2xxx Al series
- 7xxx Al series
- 5xxx Al series
- Dissimilar materials
- Process conditions
- Microstructure
- Parent material
- Weld zone
- Weld
- Thermomechanically affected zone
- HAZ
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