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

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:735

Article

Moussaoui, K.¹  Rubio, W.¹  Mousseigne, M.¹  Sultan, T.²  Rezai, F.³ 

[1] Inst Clement Ader, 3 Rue Caroline Aigie, F-31400 Toulouse, France

[2] Prismadd, 2 Impasse Georges Courteline, F-82000 Montauban, France

[3] Ecole Mines Albi, Campus Jarlard, F-81013 Albi 09, France

关键词: Selective Laser Melting;    Inconel 718;    Porosity;    Microstructure;    Mechanical properties;   

DOI  :  10.1016/j.msea.2018.08.037

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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