Abstract:
The drive to reduce vehicle emissions and fuel consumption, yet maintain strength has led to the increase in use of austenitic stainless steels and magnesium alloys in the transport industry. Therefore, the bonding together of these dissimilar alloys is of critical importance. In this study, a solid-state diffusion bonding of 316L to Ni interlayer at 900oC preceded a transient liquid phase bonding between AZ31 and the Ni interlayer at 510oC. The results showed that, during the liquid phase bonding, the bonding time controlled the isothermal solidification stage and resulted in a metallurgical bond. A combination of solid-state reaction at the 316L steel-Ni interface and eutectic liquid formation at the AZ31/ Ni gained a 17% increase in the joint shear strength compared to joints produced without the solid-state diffusion-bonding step.