Abstract
5052 aluminum alloy plate to SPCE steel plate were friction spot welded using a numerical controlled brake type friction welding machine. Microstructures and mechanical properties of friction spot welded joints were investigated The nugget such as a resistance spot welded joint was not observed, regardless of friction spot welding conditions. In case of friction time is longer, the intermetallic compound layer which had a thickness of 2-3 urn was observed at the weld interface. Hardness at SPCE steel side is no significant difference. However the softened area can be seen at the 5052 aluminum alloy side. The maximum tensile shear strength of welded joints was about 3.5kN. The test specimens which had the highest tensile shear strength were fractured at weld interface, and part of the 5052 aluminum alloy adhered to the SPCE steel side.
