Solid state diffusion bonding of Ti-6Al-4V and Co-28Cr-5Mo-0·3C alloys

An attempt to investigate solid state diffusion bonding of Ti-6Al-4V and Co-28Cr-5Mo-0·3C alloys has been made. The results showed that the joint could not be successfully bonded at 800°C, even though longer period of holding times (>1 h) was used. However, at 850°C, successful joining was achieved at holding time of 1 h. It was found that increasing temperature up to 900°C gave rise to intermetallic component formation, mainly Co 3 Ti, at the joining interface, which contributed to weak bonding strength. This technique provides a reliable method of bonding of Ti-6Al-4V to Co-28Cr-5Mo-0·3C alloys, which is very helpful in the development of biomaterial industry.