Microstructure and mechanical properties of friction stir spot welded AZ31 Mg alloy
- Yang Q. ,
- Mironov S. ,
- Sato Y.S. ,
- et al
- Yang Q. ,
- Mironov S. ,
- Sato Y.S. and
- Okamoto K.
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Friction stir spot welding (FSSW) experiments were undertaken on sheet specimens (thickness 1.3 mm) of AZ31 magnesium alloy (Mg, 3%Al, 1%Zn) and the effects of process conditions and workpiece surface condition on the macrostructure, microtexture and lap shear strength of the welded joints were investigated. The parameters varied during FSSW were spindle speed (1500-3000 rpm) and plunge depth (1.3-2.3 mm). Spot welds were fabricated in a lap shear configuration. Macrostructure was observed by optical microscopy and SEM; microtexture in the weld zone was analysed by electron backscattering diffraction. Lap shear testing was performed on an Instron 1123 screw-driven machine. Issues discussed include the formation of hook defects and failure modes.
7th International Symposium, 20-22 May 2008, 7A: Spot 2 (Mg/Fe/Al), Paper 03
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