Effect of brazing temperature on the shear strength of Inconel 600 joint

In this study, Inconel 600 alloy was brazed by using Cusil ABA which is an active filler alloy in a high-vacuum condition under a pressure of 1x10(-4) Pa. Three brazing temperatures (830, 865, and 900 degrees C) were chosen based on the solidus temperature of AgCuTi filler alloy in order to investigate the effects of these temperatures on the performance of the brazed joint. Brazing processes were carried out over a period of time (15 min) to ensure that the filler alloy was melted completely. The performance of the brazing process was evaluated in terms of bonding strength by shear test, whereas microstructural analysis was performed to investigate the bonding morphology. The results revealed that a maximum value of shear strength (223.32 MPa) was obtained at a brazing temperature of 865 degrees C compared with other temperatures. It was also observed morphologically that the highest shear strength was influenced by the formation of two reaction layers that crossed in the center of the brazed area due to interdiffusion effect of several constituents from the Inconel 600 alloy and active brazing filler.