Friction welding of 2017 and 6061 aluminum alloys to S45C carbon steel
Ochi Hiizu; Ogawa Koichi; Yamamoto Yoshiaki; Suga Yasuo
Abstract:Joint performance of two types of friction welded butt joints, A2017/S45C and A6061/S45C, fabricated under several welding conditions was investigated. In the case of A2017/S45C joint, the joint strength decreased with an increase in forging pressure, and the intermetallic compounds of Al7Cu2Fe and iron -aluminum alloy were observed at the weld interface. On the other hand, in the case of A6061/S45C joint, the joint strength increased with an increase in forging pressure, and iron-aluminum alloy was observed at the weld interface. Such a difference in the effect of forging pressure on microstructure at the weld interface depends on the deformation property of each aluminum alloy at elevated temperature. And the thinner was the intermetallic compound or the iron-aluminum alloy, the higher was the joint strength. Key Words:friction welding, 2017 aluminum alloy, 6061 aluminum alloy, S45C carbon steel, joint strength