Phase formation during dissimilar transient liquid phase (TLP) bonding of IN939 to IN625 using a Ni-Cr-Fe-Si-B interlayer

Effect of bonding temperature on the microstructure and mechanical properties of Hastelloy X superalloy joints bonded with a Ni–Cr–B–Si–Fe interlayer

The bonding temperature effect of the diffusion brazing Inconel 625 superalloy on the microstructure changes, corrosion resistance, and mechanical properties

Properties of IN X-750/BNi-2/SAF 2205 joints formed by transient liquid phase bonding

Transient liquid phase (TLP) bonding using various holding times (5, 80, 320, and 640 min) was conducted on Hastelloy X using an Ni–Cr–B–Si–Fe filler metal at 1070 °C. High temperature stress rupture (creep) tests were performed on the TLP bonded joints at 816 °C under a stress of 110 MPa. The 320 min holding time sample had the highest rupture life (95.9 ks). The presence of uniformly distributed borides along the joint grain boundaries was determined to be the primary reason for improved creep properties. These particles were observed using electron backscattered diffraction (EBSD). The large values of creep strain observed in the 640 min holding time sample were due to a decrease in the number of grain boundary borides present in the joint area. An investigation on the creep fracture surfaces revealed a transition of the failure mechanism from transgranular to intergranular with increasing holding time. The fracture surface and elemental map were studied using electron probe microanalysis (EPMA); results showed that cracks initiated at the interface of eutectic components in samples with lower holding times (5 and 80 min), while the hard and brittle grain boundary borides available in the joint were the preferred sites for crack initiation in the 320 min sample.

Holding time influence on creep behavior of transient liquid phase bonded joints of Hastelloy X

Effect of transient liquid phase bonding time on the microstructure, isothermal solidification completion and the mechanical properties during bonding of Inconel 625 superalloy using Cr-Si-B-Ni filler metal

Masoud Vatanara

Papers

Effect of transient liquid phase bonding time on the microstructure, isothermal solidification completion and the mechanical properties during bonding of Inconel 625 superalloy using Cr-Si-B-Ni filler metal