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Title: Powder bed binder jet 3D printing of Inconel 718: Densification, microstructural evolution and challenges

Journal Article · · Current Opinion in Solid State and Materials Science
 [1];  [2];  [3];  [3];  [2];  [4]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division and Manufacturing Demonstration Facility
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility and Energy and Transportation Sciences Division
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility and Energy and Transportation Sciences Division ; Univ. of Tennessee, Knoxville, TN (United States). Department of Mechanical, Aerospace and Biomedical Engineering

Traditional manufacturing of Inconel 718 components from castings and thermomechanical processing routes involve extensive post processing and machining to attain the desired geometry. Additive manufacturing (AM) technologies including direct energy deposition (DED), selective laser melting (SLM), electron beam melting (EBM) and binder jet 3D printing (BJ3DP) can minimize scrap generation and reduce lead times. While there is extensive literature on the use of melting and solidification based AM technologies, there has been limited research on the use of binder jet 3D printing. In this paper, a brief review on binder jet additive manufacturing of Inconel 718 is presented. In addition, existing knowledge on sintering of Inconel 718 has been extended to binder jet 3D printing. We found that supersolidus liquid phase sintering (SLPS) is necessary to achieve full densification of Inconel 718. SLPS is sensitive to the feedstock chemistry that has a strong influence on the liquid volume fraction at the processing temperature. Based on these results, we discuss an empirical framework to determine the role of powder particle size and liquid volume fraction on sintering kinetics. In conclusion, the role of powder packing factor and binder saturation on microstructural evolution is discussed. The current challenges in the use of BJ3DP for fabrication of Inconel 718, as well as, extension to other metal systems, are presented.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Temperature Materials Lab. (HTML); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility (MDF)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1339381
Alternate ID(s):
OSTI ID: 1550649
Journal Information:
Current Opinion in Solid State and Materials Science, Vol. 21, Issue 4; ISSN 1359-0286
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 103 works
Citation information provided by
Web of Science

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Effect of Powder Feedstock on Microstructure and Mechanical Properties of the 316L Stainless Steel Fabricated by Selective Laser Melting journal September 2018
Assumption of Constraining Force to Explain Distortion in Laser Additive Manufacturing journal November 2018
Additive Manufacturing of Nickel Superalloys: Opportunities for Innovation and Challenges Related to Qualification journal June 2018
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Additive Manufacturing of Metallic and Ceramic Components by the Material Extrusion of Highly-Filled Polymers: A Review and Future Perspectives journal May 2018
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Predictive modeling of solidification during laser additive manufacturing of nickel superalloys: recent developments, future directions journal January 2018
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