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

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-re...

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Bibliographic Details
Published in:JOM (1989) 2017-05, Vol.69 (5), p.880-885
Main Authors: Gong, Jiadong, Snyder, David, Kozmel, Thomas, Kern, Chris, Saal, James E., Berglund, Ida, Sebastian, Jason, Olson, Gregory
Format: Article
Language:English
Subjects:
Aerospace engineering
Alloys
Castability
Castings
Chemistry/Food Science
Coarsening
Creep strength
Design
Design engineering
Earth Sciences
Efficiency
Energy
Engineering
Environment
Equilibrium
Materials Science
Metallurgy & Metallurgical Engineering
Mineralogy
Mining & Mineral Processing
Nickel base alloys
Oxidation
Physics
Single crystals
Solidification
Superalloys
Temperature
Turbines
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Summary: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.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-017-2300-3