It is expressed in diffusion migration on solidliquid phase boundary in the process of isothermal seasoning of a brazed joint
Chromium and aluminum ensure protection of a brazed joint
(BJ) against oxidation; titanium, aluminum and tantalum define formation of [gamma]'-phase, which hardens matrix of nickel alloy; carbon, zirconium and boron enable precipitation of hardening phases over grain boundaries.
Application of repair brazing instead of argon arc welding with tungsten electrode of components of HTA is based on the effect of activated diffusion interaction between particles of a composite brazing alloy and surfaces to be joined in local areas of the parts, which is the result of contact melting of surfaces of particles and walls of the part by low-melting component of the brazing alloy and further heat treatment of a brazed joint
at the temperature, which is by 100-120 [degrees]C lower than maximum temperature of isothermal brazing .
Mechanical Properties of the Brazed Joint
. Figure 10 shows the variation of the shear strength of the joint with the brazing temperature.
The estimated locations for corrosion of the brazed joint
are shown in Figure 2.
Periodic flush testing of rails and daily sectioning of a random brazed joint
followed by inspection through a microscope are also performed.
Interface structure and mechanical properties of the brazed joint
of TiC-cermet and steel.
This phenomenon can be explained by the following special features of solidification of the metal of the brazed joints
. The cooling of the brazed joint
is characterised by the solidification of the solid solution based on equal ([gamma]-phase) in the form of primary grains with a higher melting point.
The joints can be made as quickly as a brazed joint
, and unlike the joints used in 1991 there were no leaks when the piping was down to temperature.
But design director Helmuth Schrader felt the hand-finished brazed joint
gives a higher quality appearance.
Ghaffari, "Increasing Ti-6Al-4V brazed joint
strength equal to the base metal by Ti and Zr amorphous filler alloys," Materials Characterization, vol.