Study on Weldability of Dispersion Hardening Alloy (Report 5)

Application of solid state bonding to TD nickel

Abstract

In this study, the reliability of solid state bonded joints of TD nickel was examined by tensile tests at high temperatures and fractography.
The main results obtained are summarized as follows:
(1) The joint efficiencies of solid state bonded joints made by one-step bonding method were about 100%. And the joint efficiencies were superior to those of the fusion welded joints. But, the reduction of area in such joints was inferior to that in the base metal.
(2) The joint efficiencies of solid state bonded joints made by two-step bonding method were 100% and the reduction of area in such joints was 80-100% of that in the base metal.