Analysis of the stir zone produced by friction stir spot joining
- Fujimoto M. ,
- Watanabe D. ,
- Abe N. ,
- et al
- Fujimoto M. ,
- Watanabe D. ,
- Abe N. ,
- Sato Y.S. and
- Kokawa H.
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Description
Similar overlap and dissimilar butt joints were fabricated by friction stir spot joining of AA 6061-T6 (Al, 1-1.1%Mg, 0.66-0.67%Si) and AA 5052-H34 (Al, 2.58%Mg) sheets of thickness 1 and 2 mm, respectively, and microstructural analysis was used to investigate metallurgical features and material flow characteristics. The process conditions employed were a rotational speed of 2000 rpm, tool load of 4508 N and process time of 2 or 4 s. Joint microstructure was observed by optical microscopy, the average grain size was measured by electron backscattered diffraction, and fracture surfaces were examined by SEM. Issues discussed include crystallographic orientation in the stir zone and the effect of plastic deformation on material flow.
7th International Symposium, 20-22 May 2008, 11A: Spot 3 (Al), Paper 03
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