The influence of the interlayers thicknesses on the stress-strain state in the nodes with soft interlayer of IC10 superalloy

In this study, the influence of thicknesses of the interlayers on the stress-strain state in the nodes with soft interlayer was investigated by computer simulation. To establish the general patterns of SSS formation when loading cylindrical nodes with interlayers of soft rigidity and checking the adequacy of the simulation, thickness of interlayer (0.01,0.03,0.05,0.08mm) with a small TCLE was calculated. The results show that when the thickness of the interlayer changes, the dimensions of this zone vary in direct proportion only. The length from the outer surface of the assembly in the base material at all thicknesses is about 5 times the thickness of the interlayer. Outside this zone, the radial, axial and tangential stresses in the base metal become negligibly small. The interlayer material is in the volumetric stress state throughout its entire length. This provides reliability guidance for the theory of TLP diffusion welding under large gap.