Parts from heat-resistant nickel alloys with directional crystallization, as well as single crystals are used in engines and power plants operating under conditions of high temperatures and loads. In this paper, the study of the structure formation in the process of selective laser melting of a heat-resistant nickel alloy was conducted. It is obtained that the length of the forming grains considerably exceeds the thickness of one build layer. The results of the influence of the technological parameters of the selective laser melting process on the directionally crystallized structure characteristics are shown. Elongated grains oriented along the growth direction. The composition, structure, and properties of the obtained samples were studied.Keywords: Selective laser melting, Inconel 718, nickel superalloy, powder metallurgy, additive manufacturing
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