Resistance Spot Welding of Dissimilar Metals-Commercial Pure Titanium to Some Aluminum Alloys

Abstract

The properties and problems of spot welding commercial pure titanium to some aluminum alloys (1100-H14, 5052-H34 and 6061-T4) are examined by means of tensile shear test and macroor micro-structural observations. The results obtained are as follows:
1) The spot welded joints of titanium-1100, -5052 and -6061 aluminum are ductile and each tensile shear strength reaches about 150, 320 and 300 kg/spot, respectively.
2) The bonding of titanium to aluminum is accomplished in a manner of brazing.
3) It is shown that there is not any intermetallic compounds such as TiA1₃ in the welded joints regardless of the mutual diffusion of Ti and Al through the bonding interface.