Dissimilar friction spot welding of aluminium and magnesium for automotive applications using novel approaches - abrasion circle FSSW and refill FSSW
- Chen Y.C. ,
- Zhong X.L. ,
- Al-Zubaidy B.M. ,
- et al
- Chen Y.C. ,
- Zhong X.L. ,
- Al-Zubaidy B.M. and
- Prangnell P.
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Abrasion circle and modified refill friction stir spot welding (FSSW) techniques were employed to fabricate dissimilar joints between 6111-T4 (Al, 0.75%Mg, 0.69%Si, 0.75%Cu) and AZ31 (Mg, 3%Al, 1%Zn, 0.5%Mn) alloy sheets (thickness 0.9 mm) with the aim of reducing the level of intermetallic compound formation, and the microstructure and mechanical properties of the joints were investigated. Lap joints were made by abrasion circle FSSW at rotational speeds of 800-1700 rpm and a shoulder plunge depth of 0.1 mm. Modified refill FSSW experiments were conducted on a RS100 machine at rotational speeds of 1900-2800 rpm and a sleeve plunging depth of 1 mm. Microstructures were observed by optical microscopy, TEM and energy dispersive X-ray spectroscopy. Room temperature lap-shear tensile testing was undertaken immediately after welding.
10th International Symposium, 20-22 May 2014, Session 6B: Performance, Paper 04
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