The technology for automated development of economically doped heat-resistant nickel superalloys
JSC “NPO SATURN”, 163 Lenin avenue, Rybinsk 152903, Russia
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The paper presents the usage of computational technology, aimed at automated search for optimum compositions of nickel superalloys, being minimally doped by expensive rhenium and having no ruthenium. Resulting doping compositions ensure ultimate long-term high-temperature strength. The technology is based on computer model of alloy and numerical optimization routine. The model computes relation between an alloy composition and its performance characteristics. Multiobjective optimization procedure provides for an automated search for alloy composition to ensure the set of pre-defined properties of a new material. Two new nickel-based single-crystal superalloys are presented, which were created using this technology. SLGS-3 features high-temperature strength (100 hours at 1,000 degrees Centigrade) at approximately 345 MPa. Its composition does not contain ruthenium. SLGS-1 alloy provided for 265 MPa and contained neither rhenium nor ruthenium in its composition.
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