Primary structure and physical properties of new superalloys Co-20Ni-10Al-5Mo-2Nb on Cobalt Matrix

In the study we investigated the primary structure and physical properties of the new generation of superalloys based on Co₁₀Al₅Mo₂Nb type cobalt. The microstructural investigations were carried out with a scanning electron microscope on conventionally prepared electrolytically etched metallographic microsections. The studies of microstructure using a transmission electron microscope were performed using thin films. The testing of mechanical properties in the as-received condition included the performance of static tensile test at room temperature using a testing machine with a maximum load of 200 kN. These materials may replace nickel-based superalloys in the future due to their excellent properties at elevated temperatures relative to nickel-based superalloys. Currently, nickel-strengthened γ′ phase steels are still unrivalled in aerospace applications. However, cobalt-based superalloys are a response to their existing limitations, which do not allow maintaining the current rate of development of aircraft engines.