Abstract
Joining of dissimilar materials by diffusion bonding and friction welding have been considered for investigation for comparing the process output. The authors have made an attempt to compare the performance of the joints fabricated by these two processes, considering that both processes involve solid state joining, used in the joining of cylindrical work pieces. Cylindrical work pieces are often joined using the diffusion bonding process. But the friction welding process can be effectively used to join particularly dissimilar joints for better joint strength. An attempt has been made to join commercial rods of Ti-6Al-4V and stainless steel 304L with copper as the intermediate metal using friction welding. The strength of the joint was evaluated in comparison to diffusion bonding. The friction welded joints showed better joint strength and the processing time was also minimum when compared to diffusion bonding. The joint strength attained by friction welding was 520 MPa as against 282 MPa by diffusion bonding for the joints under consideration. The bonding time for friction welding is as low as 36 min as against 127 min for diffusion bonding. Further between both the processes, friction welding is suggested as an effective and efficient process to join the dissimilar combination under investigation.
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