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Avoiding Thermal-Stress-Induced Failures by Design Optimization when Brazing Perlucor® to Inconel® 718 Components

L. Spatafora, J. Isele, H.-J. Ritzhaupt-Kleissl, V. Hagenmeyer, J. Aktaa

Journal of Ceramic Science and Technology, Vol. 10, No. 2 (2019), pp. 1-10

DOI: 10.4416/JCST2019-00011

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Abstract

The advanced design of the video inspection system GeoKam for optical inspection of deep boreholes requires the joining of a transparent ceramic window to the Inconel® 718 housing. Active brazing using Incusil ™ ABA as active brazing material gave the best results. Detailed design calculations were performed using the codes ABAQUS® and STAU. Design optimizations resulted in the construction of a sleeve as an adapter part between the ceramic and the Inconel® 718 housing. An important result of the calculations was to avoid sharp edges of the sleeve by realization of a chamfer in order to reduce the fracture probability. The results of the design calculations could be verified with model experiments.

Keywords

Metal-ceramic-joint, residual stress calculation, failure probability, active brazing

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