ASSESSMENT OF THE IN HOMOGENEITY OF THE PHYSICO-MECHANICAL PROPERTIES OF PARTS OF AEROSPACE ENGINEERING OBTAINED BY SELECTIVE LASER MELTING

Abstract

The article considers the problem of assessing the damage and heterogeneity of a material obtained by selective laser melting. To study these characteristics, it is planned to adapt a new method of ultra-jet diagnostics, developed at the Bauman Moscow State Technical University. Its feature is the ability to assess the damage to the material and its technological memory, i.e. conditions, modes and factors that influenced the formation of the structure and operational characteristics in the process of manufacturing parts by selective laser melting. The article compares traditional control methods and the method of ultra-jet diagnostic, which, as studies have shown, will expand the arsenal of applied monitoring and diagnostics, which is extremely important for critical parts of aerospace technology. The experiments were conducted on special samples and witness samples obtained from materials widely used in the manufacture of spacecraft. The most important result of the research was the conclusion about the relationship between the variability of the parameters of the surface micro relief due to the process of hydroerosion under the action of a high-speed jet of water and structurally inhomogeneous, physically anisotropic material obtained by the selective laser melting technology.