Avtomaticheskaya Svarka (Automatic Welding), #6, 2019, pp.65-70
Investigation of deep penetration conditions when making samples from high-temperature alloy Inconel 718 by the method of selective laser melting
S.V. Adzhamskii1,2, A.A. Kononenko2,3
O. Honchar Dniepr National University. 72 Gagarin Ave., 49000, Dniepr, Ukraine. E-mail: firstname.lastname@example.org
LLC «Additive Laser Technology of Ukraine». 144 Rybinskaya Str., 49000, Dniepr, Ukraine. E-mail: email@example.com
Z.I. Nekrasov Institute of Ferrous Metallurgy of the NAS of Ukraine. 1 Starodubov Sq., 49000, Dniepr, Ukraine.
A dependence was established between selective laser melting parameters (laser power and distance between the tracks) and microstructure of samples from Inconel 718 alloy, provided a beam of a rather small diameter (0.05 mm) is used. The method of selective laser melting in ALT Alfa-150 unit manufactured by LLC «Additive Laser Technology of Ukraine» was used to make samples from Inconel 718 alloy. For the first sample series variable laser power was assigned in the range of 150 – 250 W, for the second series the distance between the tracks was varied in the range of 0.09 – 0.13 mm. Microstructural studies were conducted using optical microscope AXIOVERT 200M MAT. The effects of selective laser melting parameters (laser power, distance between tracks) on the structure of Inconel 718 material are considered. The results of the work were used to establish the dependencies between selective laser melting parameters and melt pool depth and width. Conditions of deep penetration with coarse porosity formation were determined. 20 Ref., 1 Tabl., 6 Fig.
Keywords: additive technologies, selective laser melting, powder materials, high-temperature nickel alloys, Inconel 718, melt pool, deep penetration conditions
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