Formation of a given variable structure in detail by means of selective laser melting technologya

• Main Authors: Borisov Evgeny, Masailo Dmitry, Polozov Igor, Popovich Vera
• Format: Article
• Language: English
• Published: EDP Sciences 2018-01-01
• Series: SHS Web of Conferences
• Online Access: https://doi.org/10.1051/shsconf/20184400017

The issue for creation of products with functional properties adapted to working conditions is currently vital. The possibility of creating local areas with a specified microstructure and properties in the product is of special interest. This work covers the performed study of the structure and properties of the heat-resistant nickel alloy Inconel 718, depending on the process parameters used. The possibility for combination of different process modes during manufacture of one product to obtain its variable structure is shown. The specimens with areas of small equiaxed and large elongated grains were studied. The carried out EBSD analysis showed that the local change in the size and morphology of the material grain is possible by changing the layer thickness and process parameters of the selective laser melting process. It is shown that after the heat treatment and hot isostatic pressing, the differences in the structure and mechanical properties between the areas remain.