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Thermodynamic and Kinetic Simulation of the Brazing Process Applied to Ni-Base Superalloys

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Abstract

A combination of thermodynamic and kinetic modeling, in the framework of the CALPHAD approach, has been used to simulate the brazing process applied to the joining of a René 80 superalloy by a Df4b filler. For thermodynamic equilibrium calculations the ThermoCalc software has been used, equipped with the TCNI8 database, while diffusion simulations have been obtained using the DICTRA software. As a result, elemental as well as phase precipitation profiles in the joining area have been obtained as a function of the distance and as a function of time, during the heat treatment adopted for the brazing process. Then, calculation results have been compared to experimental observations of a real joining obtained by applying the same heat treatment of the simulation. As a conclusion the simulation procedure was validated by experiments.

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Correspondence to G. Roncallo.

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This invited article is part of a special tribute issue of the Journal of Phase Equilibria and Diffusion dedicated to the memory of Günter Effenberg. The special issue was organized by Andrew Watson, Coventry University, Coventry, United Kingdom; Svitlana Iljenko, MSI, Materials Science International Services GmbH, Stuttgart, Germany; and Rainer Schmid-Fetzer, Clausthal University of Technology, Clausthal-Zellerfield, Germany.

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Roncallo, G., Costa, A., Guarnone, P. et al. Thermodynamic and Kinetic Simulation of the Brazing Process Applied to Ni-Base Superalloys. J. Phase Equilib. Diffus. 41, 303–310 (2020). https://doi.org/10.1007/s11669-020-00795-4

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  • DOI: https://doi.org/10.1007/s11669-020-00795-4

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