Open AccessInfluence of vacuum brazing temperature on the microstructure of an Inconel 783 superalloy joint with a honeycomb sealing made of Hastelloy X superalloy
Author(s) -
Kamil Krystek,
Irena Dul,
Maciej Motyka
Publication year - 2019
Publication title -
przegląd spawalnictwa
Language(s) - English
Resource type - Journals
eISSN - 2449-7959
pISSN - 0033-2364
DOI - 10.26628/wtr.v91i9.1061
Subject(s) - superalloy , inconel , materials science , brazing , microstructure , metallurgy , scanning electron microscope , joint (building) , filler metal , nickel , honeycomb , alloy , composite material , welding , architectural engineering , arc welding , engineering
The purpose of this work was to assess the influence ofbrazing temperature on microstructure of the cobalt-based Inconel 783 superalloy joint with nickel-based Hastelloy X superalloy ‒ seal shaped in honeycomb structure. Brazing process was combined with solution heat treatment of Inconel 783 in one operation. Nickel based brazing filler metal from BNi-2 group was used. Tests were conducted in 1121 °C (solutionizing temperature), 1075 °C and 1030 °C in 1 hour. Subsequently, metallographic investigations were made using optical and scanning electron microscopes, mainly focused on changes in a seal made of Hastelloy X, where joint erosion in higher temperature was observed.