Effect of machining process on the joint strength of friction welded joint of 6061 aluminum pipe and S25C carbon steel pipe

摘要

Comparatively thick pipes of 6061 aluminum alloyand S25C carbon steel were friction welded under a preferablewelding condition and the strength distribution on the weldinterface was investigated. The results obtained are as follows; (1)According to a decrease of the thickness ratio 0.30, 0.16,0.15,0.14, 0.13 and 0.12, the joint efficiency decreased73.9percent, 68.1percent, 63.8percent, 55.8percent, 39.9percentand 21.6percent, respectively. (2) Friction welding of thin pipehaving less thickness ratio t/D_0 than 0.11 was difficult toproduce a sound weld (D_0: outer diameter, t: thickness of pipe).(3) The tensile strength of each 11.1percent area from inner andouter edges of the weld interface was low, and the jointefficiencies were 30~50percent. (4) The joint efficiency of thejoint removed inner and outer areas of the weld interface was about 95percent.