Effects of Selective Laser Melting additive manufacturing parameters of Inconel 718 on porosity, microstructure and mechanical properties

Abstract : The effect of SLM parameters on porosity, microstructure and mechanical properties is studied. To this purpose, the Selective Laser Melting (SLM) technology is applied to manufacture Inconel 718 specimens. The material, the manufacturing process, the Hot Isostatic Pressure (HIP), heat treatment, observation procedures and characterisation of mechanical properties are presented. A columnar-dendritic microstructure was observed on all the SLM specimens and a Volumetric Energy Density (VED) effect on the latter was also noted. The rate of porosity varies in relation to the VED and is considerably reduced after HIP. The heat treatment erases the dendritic microstructure, significantly enhances microhardness and confers on the alloy tensile mechanical properties comparable to forged Inconel 718.
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Materials Science and Engineering: A, Elsevier, 2018, 735, pp.182 - 190. 〈10.1016/j.msea.2018.08.037〉
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https://hal-mines-albi.archives-ouvertes.fr/hal-01867274
Contributeur : Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Soumis le : mardi 4 septembre 2018 - 10:59:20
Dernière modification le : mardi 11 septembre 2018 - 15:18:59

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K. Moussaoui, Walter Rubio, Michel Mousseigne, T. Sultan, Farhad Rezai-Aria. Effects of Selective Laser Melting additive manufacturing parameters of Inconel 718 on porosity, microstructure and mechanical properties. Materials Science and Engineering: A, Elsevier, 2018, 735, pp.182 - 190. 〈10.1016/j.msea.2018.08.037〉. 〈hal-01867274〉

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