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Properties of newly developed Co-based brazing fillers

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Abstract

Co-based materials are widely used in high temperature applications like aircraft industry, industrial furnaces, or gas turbine manufacturing. The main requirements on the Co superalloys are high temperature and corrosion resistance. To produce complex structures, it is necessary to join these alloys. In this work, Co-based brazing fillers for high temperature service conditions are developed. The influence of different alloying elements on the melting behavior as well as on the microstructure is investigated. A melting temperature below 1200 °C is achieved via addition of Ti to the near eutectic alloy CoZrTaC9, developed in previous studies. Brazing tests are carried out on the Co-based superalloy Mar M 509 using induction heating. The mechanical properties are determined by tensile tests at room temperature and at an elevated temperature of 850 °C. The fracture morphology of the tensile samples is investigated by light microscopy as well as SEM.

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Acknowledgments

Part of the research was carried out within the scope of the project No. 17622 BR funded by the Bundesministerium für Wirtschaft und Energie (BMWi) via the Arbeitsgemeinschaft industrieller Forschungsvereinigungen “Otto von Guericke” e.V. The authors thank the BMWi for financing this project and the project partners for carrying out the thermodynamic simulations.

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Authors and Affiliations

  1. Institute of Materials Science and Engineering, Technische Universitaet Chemnitz, Chemnitz, Germany

    T . Uhlig, S. Weis, B. Wielage & G. Wagner

  2. CeWOTec gGmbH – Chemnitzer Werkstoff- und OberflächenTechnik, Chemnitz, Germany

    S. Schuberth

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  1. T . Uhlig
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  2. S. Weis
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  3. B. Wielage
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  4. G. Wagner
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  5. S. Schuberth
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Correspondence to T . Uhlig.

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C-XVII Brazing, Soldering, and Diffusion Bonding

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Uhlig, T..., Weis, S., Wielage, B. et al. Properties of newly developed Co-based brazing fillers. Weld World 61, 171–180 (2017). https://doi.org/10.1007/s40194-016-0388-7

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  • DOI: https://doi.org/10.1007/s40194-016-0388-7

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