Mechanical properties and failure modes of friction stir clinch joints between 6061-T6 aluminum and S45C steel sheets
- Lin P.C. ,
- Liao P.S. ,
- Su Z.M. ,
- et al
- Lin P.C. ,
- Liao P.S. ,
- Su Z.M. and
- Aoh J.N.
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Dissimilar joints between 6061-T4 aluminium alloy and S45C steel sheets (thickness 1.6 mm and 1 mm, respectively) were fabricated by the friction stir clinching technique using two types of tools and their mechanical properties and failure modes were investigated under different loading conditions. The tool types incorporated flat tool shoulders with smooth or notched probes. Process parameters included a rotational speed of 500 rpm, initial indentation depth of 2.8 or 3.4 mm and an indentation rate of 120 mm/min. Microstructures were observed by optical microscopy. Lap-shear and cross-tension specimens were tested using an MTS servohydraulic testing machine at a displacement rate of 5 mm/min. The average failure load obtained from three specimens was used as the reference to determine load ranges in subsequent fatigue tests. Failure modes under quasistatic shear, quasistatic opening and cyclic shear loading conditions are discussed.
10th International Symposium, 20-22 May 2014, Session 3B: FSSW I, Paper 01
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