Feasibility study of short cycle time friction stir spot welding thin sheet Al to ungalvanised and galvanised steel
- Chen Y. ,
- Farid H. and
- Prangnell P.
- Chen Y. ,
- Farid H. and
- Prangnell P.
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Description
The feasibility of short-cycle friction stir spot welding for joining thin sheet aluminium alloys and steels, both galvanised and ungalvanised, was evaluated. Welds were made between 6111-T4 AlMgSi alloy (Al, 0.75%Cu, 0.25%Fe, 0.75%Mg, 0.2%Mn, 0.69%Si, 0.04%Ti, 0.02%Zn, 0.93 mm thickness) and three different steel sheets (1 mm thickness) using various tools: a WC pin tool; a WCCVD diamond coated pinless tool and a tool steel wiper tool with 6 flutes. The steels were uncoated formable DC04 (0.08%C, 0.4%Mn), hot-dip galvanised steel DX54Z (0.01%C, 0.01%Al, 0.3%Mn, 0.125%Ti) and galv-annealed DX53ZF (0.03%C, 0.01%Al, 0.3%Mn, 0.125%Ti). The tensile strength, fracture paths and microstructure of the joints were examined. The effects of plunge depth and rate, rotation speed and top-sheet material (aluminium or steel) on the material flow, fracture location and tensile strength were determined.
8th International Symposium, 18-20 May 2010, Session 10B: Automotive Spot 2, Paper 02
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