SiC particle enhancing friction stir spot welded AZ31 magnesium alloy joint
- Shen J. ,
- Wen L.B. and
- Li Y.
- Shen J. ,
- Wen L.B. and
- Li Y.
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Description
Friction stir spot welding (FSSW) was employed to fabricate lap joints in hot extruded AZ31 magnesium alloy sheets (thickness 2 mm), and the effect of introducing nanostructured SiC particles (mean size 40 nm) on the microstructure and mechanical properties was investigated. The nanoparticle enhanced FSSW process was conducted using a threaded welding tool to stir the SiC powder embedded in the sheet. Welding was performed at a rotational speed of 1400 rpm, plunge rate of 0.5 mm/s and dwell time of 5 s. Optical microscopy was used to observe microstructures in the stir zone, thermomechanically affected zone and HAZ. Mechanical properties were characterised by lap-shear tensile tests and microhardness measurements.
10th International Symposium, 20-22 May 2014, Session 6A: FSSW II, Paper 01
Subjects
- Friction welding
- Welding
- Process
- Friction stir spot welding
- Nonferrous
- Material
- Magnesium and Mg alloys
- Powder
- Weld zone
- Weld
- Dynamically recrystallised zone
- HAZ
- Thermomechanically affected zone
- Microstructure
- Grain
- Strength
- Mechanical properties
- Properties
- Ultimate tensile strength
- Hardness
- Shear strength
- Ceramics
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