Interfacial microstructure and property of resistance spot welding joints of titanium to stainless steel

【摘要】 Commercially pure titanium and stainless steel sheets were welded using the technique of resistance spot welding with an aluminum alloy insert.The interfacial microstructure of the joint was observed and analyzed using electron microscopy;the tensile shear strength was investigated.An approximate 160 nm thick layer of Al solid solution supersaturated with Ti was observed at the interface between titanium and aluminum alloy.The solid solution layer contained the precipitates TiAl3.And an approximate 1.5 μm thick serrate reaction layer was observed at the interface between stainless steel and aluminum alloy.The maximum tensile shear load of 5.38 kN was obtained from the joint welded at the welding current of 10kA.The results reveal that the property of the joint between titanium and stainless steel can be improved by using an aluminum alloy insert.更多还原

【Abstract】 Commercially pure titanium and stainless steel sheets were welded using the technique of resistance spot welding with an aluminum alloy insert.The interfacial microstructure of the joint was observed and analyzed using electron microscopy;the tensile shear strength was investigated.An approximate 160 nm thick layer of Al solid solution supersaturated with Ti was observed at the interface between titanium and aluminum alloy.The solid solution layer contained the precipitates TiAl3.And an approximate 1.5 μm thick serrate reaction layer was observed at the interface between stainless steel and aluminum alloy.The maximum tensile shear load of 5.38 kN was obtained from the joint welded at the welding current of 10kA.The results reveal that the property of the joint between titanium and stainless steel can be improved by using an aluminum alloy insert.更多还原