![]() īecause these alloys are intended for high temperature applications their creep and oxidation resistance are of primary importance. Superalloys have made much of very-high-temperature engineering technology possible. Creep is typically the lifetime-limiting factor in gas turbine blades. The primary application for such alloys is in aerospace and marine turbine engines. Superalloys are often cast as a single crystal-while grain boundaries may provide strength at low temperatures, they decrease creep resistance. Oxidation or corrosion resistance is provided by elements such as aluminium and chromium. Superalloys develop high temperature strength through solid solution strengthening and precipitation strengthening from secondary phase precipitates such as gamma prime and carbides. Superalloy development relies on chemical and process innovations. Examples of such alloys are Hastelloy, Inconel, Waspaloy, Rene alloys, Incoloy, MP98T, TMS alloys, and CMSX single crystal alloys. The crystal structure is typically face-centered cubic (FCC) austenitic. Key characteristics of a superalloy include mechanical strength, thermal creep deformation resistance, surface stability, and corrosion and oxidation resistance. Nickel superalloy jet engine ( RB199) turbine bladeĪ superalloy, or high-performance alloy, is an alloy with the ability to operate at a high fraction of its melting point. ![]()
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