Wiktionary
n. (context metallurgy English) Any of several high-performance alloys that are resistant to high temperatures
Wikipedia
A superalloy, or high-performance alloy, is an alloy that exhibits several key characteristics: excellent mechanical strength, resistance to thermal creep deformation, good surface stability and resistance to corrosion or oxidation. The crystal structure is typically face-centered cubic austenitic. Examples of such alloys are Hastelloy, Inconel, Waspaloy, Rene alloys, Haynes alloys, Incoloy, MP98T, TMS alloys, and CMSX single crystal alloys.
Superalloy development has relied heavily on both chemical and process innovations. Superalloys develop high temperature strength through solid solution strengthening. An important strengthening mechanism is precipitation strengthening which forms secondary phase precipitates such as gamma prime and carbides. Oxidation or corrosion resistance is provided by elements such as aluminium and chromium.
The primary application for such alloys is in turbine engines, both aerospace and marine.
Usage examples of "superalloy".
With a grating of sliding rock against superalloy, they began their descent.
Superalloys in turbine blades have complex crystalline structures, being composed of such combinations as cobalt, chromium, tungsten, tantalum, carbon, and refractory metal carbides.