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

K. Moussaoui 1 Walter Rubio 1 Michel Mousseigne 1 T. Sultan 2 Farhad Rezai-Aria 1
1 ICA - Institut Clément Ader
2 Prismadd
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.
Keywords : Mechanical properties Microstructure Porosity Selective Laser Melting Inconel 718
Type de document :
Article dans une revue
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 : vendredi 16 novembre 2018 - 01:04:29

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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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