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

Abstract

Inthisstudy, Inconel 600alloywasbrazedbyusing Cusil ABA which is an active filler alloy in a high-vacuum condition under a pressure of 1×10 �4 Pa. Three brazing temperatures (830, 865, and 900 °C) were chosen based on the solidus temperature of AgCuTi filler alloy in order to investigate the effects of these temperatures on the perfor- mance 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 inves- tigate the bonding morphology. The results revealed that a maximum value of shear strength (223.32 MPa) was obtained at a brazing temperature of 865 °C compared with other temperatures. It was also observed morphologically that the highest shear strength was influenced by the formation of two reactionlayersthat crossed in the center of the brazedarea due tointerdiffusioneffectofseveral constituentsfromthe Inconel 600 alloy and active brazing filler.