MC-NG: A 4th Generation Single-Crystal Superalloy for Future Aeronautical Turbine Blades and Vanes

Abstract

The growing demand for an increasing turbine inlet temperature has led both French engine manufacturers Snecma and Turbomeca to take into account the attractive potential of alloys containing rhenium and ruthenium. The MC-NG is a 4'h generation single-crystal superalloy developed and patented by Onera. This paper discusses both microstructural aspects and mechanical properties obtained on the fust MC-NG alloy elaborated in industrial conditions. Results demonstrate that there is a promising alternative to the third generation superalloys to increase the temperature capability of the single-crystal turbine blades without the drawback of a too high density or microstructural instability features.