E.G. Arginbaeva1, O.A. Bazyleva1, V.G. Kolodochkina1, K.K. Khvatsky1
 ALL-RUSSIAN SCIENTIFIC RESEARCH INSTITUTE OF AVIATION MATERIALS, email@example.com
The influence of crystallographic orientation on structure, physical and mechanical properties of intermetallic alloys based on Ni 3AlThe article presents the results of study of single-crystal samples of VKNA-type intermetallic alloy with different crystallographic orientations (CGO). The effect of crystallographic orientation <001>, <011> and <111> on microstructure, elastic modulus, tensile strength, yield strength and rapture strength. It was stated that the choice of the CGO depends on working conditions of each specific part. Accordingly, aircraft designer may choose not only materials, but also production technologies, which ensure maximum values of physical and mechanical properties. Application of intermetallic materials such as low-density VKNA alloy allows a reduction in the weight of components by 10–15%, labor input in their production, an increase of working temperature by 50–100°C, an increase in service life of nozzle blades and turbine disks about 3 and 1,5–2 times respectively and a reduction in costs of ingots as compared with commercial superalloys by 25–30%.
Keywords: VKNA, single-crystal sample, crystallographic orientation (CGO), microstructure, Ni3Al intermetallic alloy, elasticity modulus, tensile strength, yield strength, elongation, rapture strength