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 gamma' 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.