Effect of Bonding Temperature on Microstructure and Mechanical Properties of Dissimilar Joint Between Inconel 617 and Stainless Steel 310

Abstract

Dissimilar transient liquid phase (TLP) bonding between stainless steel 310 and Inconel 617 was carried out using a BNi-2 interface layer. TLP joints were fabricated at 1040, 1070 and 1100 °C for a bonding time of 60 min. In addition to microstructural evaluations, the mechanical properties of different TLP joints were also studied. The results indicated that increasing the bonding temperature resulted in decreasing the solidification zones and accelerating the formation of the intermetallic compounds. Among different TLP joints, the joint fabricated at 1040 °C exhibited the highest shear strength of 611 MPa. SEM investigations of the fractured surfaces revealed that the formation of higher amount of intermetallic compounds at higher temperatures deteriorated the shear strength of the Inconel 617/Stainless Steel 310 TLP joint.