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ICME Design of a Castable, Creep-Resistant, Single-Crystal Turbine Alloy

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Abstract

To improve the efficiency of advanced power systems, integrated computational materials engineering (ICME) tools are being developed at QuesTek Innovations LLC for the design of high-performance alloys for gas turbine. In this article, we detail progress on the design of a low-Re, castable, creep-resistant, single-crystal Ni-based superalloy (QTSX). CALPHAD-based indicators for castability (liquid buoyancy) and creep resistance (γ′ coarsening rate constant) were simultaneously employed to predict an optimum alloy composition. Component-level QTSX trail castings have been fabricated, and characterization of the castings has demonstrated freckle-free solidification and creep resistance comparable to CMSX4 and ReneN5, which validates this accelerated ICME approach.

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Acknowledgements

This material is based on work supported by the U.S. Department of Energy under Award DE-SC0009592.

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Authors and Affiliations

  1. QuesTek Innovations LLC, Evanston, IL, 60201, USA

    Jiadong Gong, David Snyder, Thomas Kozmel, Chris Kern, James E. Saal, Ida Berglund, Jason Sebastian & Gregory Olson

  2. Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA

    Gregory Olson

Authors
  1. Jiadong Gong
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  2. David Snyder
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  3. Thomas Kozmel
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  4. Chris Kern
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  5. James E. Saal
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  6. Ida Berglund
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  7. Jason Sebastian
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  8. Gregory Olson
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Correspondence to Jiadong Gong.

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Gong, J., Snyder, D., Kozmel, T. et al. ICME Design of a Castable, Creep-Resistant, Single-Crystal Turbine Alloy. JOM 69, 880–885 (2017). https://doi.org/10.1007/s11837-017-2300-3

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  • DOI: https://doi.org/10.1007/s11837-017-2300-3

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