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High-density inconel 718m: Three-dimensional printing coupled with hot isostatic pressing

: Sicre-Artalejo, J.; Petzoldt, F.; Campos, M.; Torralba, J.M.

The international journal of powder metallurgy 44 (2008), No.1, pp.35-43
ISSN: 0020-7535
ISSN: 0888-7462
ISSN: 0361-3488
Journal Article
Fraunhofer IFAM ()

The feasibility of fabricating high-density parts from Inconel 718 powder using three-dimensional printing (3DP) was assessed. Parts were subsequently hot isostatically pressed (HIPed) to achieve full density. After optimization of the particle-size distribution, parts were fabricated by means of the 3D-printing process utilizing two different devices in order to examine the influence of the binder Printed parts were sintered in high vacuum at 1,563K (1,290 degrees C) or 1,573K (1,300 degrees C) and characterized in terms of density and microstructure. Finally, sintered parts were HIPed at 1,473K (1,200 degrees C) and 142 MPa, followed by a second HIPing cycle at 1,483K (1,210 degrees C) and 206 MPa for 3 h in argon to achieve full density.