International Journal of Metallurgical & Materials Engineering · 2015 · 96 citations · 19 references
Natural SciencesMaterials EngineeringMaterials ScienceComputational ThermodynamicsMetallurgyThermodynamicsAlloy DesignAlloy ThermodynamicsAlloysHigh-temperature MaterialsMetallurgical ThermodynamicsMetalsGamma Matrix StabilityHigh-entropy AlloysHigh-temperature AlloysHigh-temperature SuperalloysSuperalloysThermal StabilityThermodynamics Of AlloyingThermodynamics Of High-entropy Alloys
Novel high temperature alloys – high entropy superalloys (HESA) have been developed by elevating the mixing entropies of Ni-Al-Co-Cr-Fe-Ti systems, these alloys contain stable FCC γ matrix and L12 γ' precipitates; compositions spaces are outside the scopes of traditional Ni-base superalloys and equimolar high entropy alloys. The thermal stability of high entropy γ' precipitates can be enhanced through alloy design by thermodynamic calculation based on Thermo-Calc. HESAs have potentials to high temperature structural application; alloy densities are below 8.0 g/cm3 with lower cost of raw materials than those of conventional Ni-base superalloys.
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