Effect of the bonding time on the microstructure and mechanical properties of a transient-liquid-phase bonded IN718 using a Ni-Cr-B filler alloy
Vpliv časa spajanja na mikrostrukturo in mehanske lastnosti spoja s prehodno tekočo fazo pri spajanju IN718 z uporabo zlitine Ni-Cr-B za spajanje

english

2013

volume 47, issue 5

nickel alloy    transient-liquid-phase bonding   superalloy    solidification    mechanical properties 

Inštitut za kovinske materiale in tehnologije
(Obvezni izvod spletne publikacije)

The paper aims at addressing the effect of the bonding time on the metallurgical and mechanical properties of a transient-liquid-phase (TLP) bonded IN718 nickel-based superalloy using an Ni-15.2Cr-4B (%) amorphous filler alloy. The results showed that after a partial isothermal solidification, the residual liquid in the joint centerline transformed, during the cooling, to non-equilibrium eutectic-type microconstituents composed of Ni-rich boride, Cr-rich boride and eutectic g-solid solution phase. The complete isothermal solidification which resulted in a formation of an intermetallic-free joint centerline occurred after a holding period 40 min at the bonding temperature of 1100 °C. An increase in the bonding time improved the joint shear strength due to a decrease in the width of the eutectic-type microconstituents in the joint centerline.

14.02.2015