Characterizations of bobbin tool friction stir welded AZ31 magnesium alloy welds
- Li W.Y. ,
- Fu T. and
- dos Santos J.F.
- Li W.Y. ,
- Fu T. and
- dos Santos J.F.
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Welded joints were fabricated in AZ31 magnesium alloy (Mg, 3.01%Al, 0.9%Zn, 0.5%Mn) sheets (thickness 2 mm) by bobbin tool friction stir welding (BTFSW) and the influence of process parameters (rotational and welding speeds) on their microstructure and hardness was investigated. BTFSW experiments were conducted at a rotational speed of 900-1200 rpm and a welding speed of 24-42 mm/min. Microstructures in the nugget, thermomechanically affected zone (TMAZ) and HAZ were observed by optical microscopy, grain size was determined using Image-Pro Plus software and microhardness was measured with a Vickers hardness tester. Issues discussed include void formation close to the TMAZ and the relationship between hardness and grain refinement.
10th International Symposium, 20-22 May 2014, Session 8B: Techniques II, Paper 02
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