Investigation of the Microstructure of Samples of the 08CrNi53MoNbTiAl Nickel-Base Alloy Obtained by Selective Laser Melting

Abstract

Nickel-base alloys are the most common high-temperature materials. They are widely used for the manufacture of parts operating under high temperatures and oxidizing environments. However, in the practical application of these high-strength alloys, there is a problem of obtaining from them products of complex shape. This problem is caused by their low processability due to the extremely narrow temperature-velocity range of plastic deformation, and also due to the complexity of the machining. One of the effective ways to produce metal products without machining is the use of additive technologies. In this work, the structure and mechanical properties of samples from a high-temperature nickel-based 08CrNi53MoNbTiAl (Russian analogue of Inconel 718) obtained by selective laser melting. The influence of parameters of the selective laser melting process on the formation of products was studied, samples for mechanical tests and metallographic studies were grown. Images of the microstructures of the samples are obtained and defects in the samples are determined. Measurements of microhardness, roughness of samples, mechanical tensile tests and impact strength were also carried out.