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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References
I. Guzman, A. Garza, F. Garcia, J. Castillo. Brazing process to repair wide gap cracks of Inconel 738 superalloy components (Material Research Society, Warrendale, 2010)
A. Borgenstam, L. Höglund, J. Ågren, and A. Engström, DICTRA, A Tool for Simulation of Diffusional Transformations in Alloys, J. Phase Equilib., 2000, 21(3), p 269
A. Engström, J. Bratberg, Q. Cheng, L. Höglund, and P. Mason, Application of Thermodynamic and Kinetic Modeling to Diffusion Simulations in Nickel-Base Superalloy Systems, Advanced Materials Research, Vol 278, Trans Tech Publications Ltd., Zurich, 2011, p 198-203
S.S. Babu, Thermodynamic and Kinetic Models for Describing Microstructure Evolution During Joing of Metals and Alloys, Int. Mater. Rev., 2009, 54(6), p 333-367
C.E. Campbell and W.J. Boettinger, Transient Liquid Phase Bonding in the Ni-Al-B System, Metall. Mater. Trans. A, 2000, 31A, p 2835-2847
B.B. Riggs, B.B. Alexandrov, A.A. Benatar, and R.R. Xu, Thermodynamic and Kinetic Simulations of High Temperature Brazing: Microstructure Evolution in CMSX-4 Joints, Sci. Technol. Weld. Join, 2017, 22(5), p 428-437
A. Schnell, A. Stankowski, and E. Marcos, A Study of the Diffusion Brazing Process Applied to the Single Crystal Superalloy CMSX, ASME Turbo Expo 2006: Power for Land, Sea, and Air, American Society of Mechanical Engineers Digital Collection, New York, 2006, p 949-961
W.H. Müller, J. Wilden, B. Schmorl, O. Stahn, Calculation of Thermodynamically Optimized Temperature-/Time-Cycles in Nickel-Based Brazing Joints, Przegl. Spawal., 2006, 88, p 65-70
S. Piegert, B. Laux, J. Rösier, Design of a Braze Alloy for Fast Epitaxial Brazing of Superalloys, Mater. Sci. Eng., 2012, 33, p 012028
Thermo-Calc 2020: https://www.thermocalc.com/products-services/databases/thermodynamic/
E. Vacchieri. Creep-Fatigue and Small Punch Creep in Gas Turbine Hot Gas Path Materials, Dissertation. ETH Zürich. 2016. No. 23893
Thermo-Calc 2020: https://www.thermocalc.com/products-services/databases/mobility/
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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