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

Abstract

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 Co₃Ti, 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.