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Title: Comparison of residual stresses in Inconel 718 simple parts made by electron beam melting and direct laser metal sintering

Journal Article · · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science
 [1];  [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

Residual stress profiles were mapped using neutron diffraction in two simple prism builds of Inconel 718: one fabricated with electron beam melting and the other with direct laser sintering. Spatially indexed stress-free cubes were obtained by EDM sectioning equivalent prisms of similar shape. The (311) interplanar spacing examined for the EDM sectioned sample was compared to the interplanar spacings calculated to fulfill force and moment balance. We have shown that Applying force and moment balance is a necessary supplement to the measurements for the stress-free cubes with respect to accurate stress calculations in additively manufactured components. Furthermore, our work has shown that residual stresses in electron beam melting parts are much smaller than that of direct laser metal sintering parts.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); 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 Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1185504
Journal Information:
Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Vol. 46, Issue 3; ISSN 1073-5623
Publisher:
ASM InternationalCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 173 works
Citation information provided by
Web of Science

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The Effect of Location and Post-treatment on the Microstructure of EBM-Built Alloy 718 book January 2018
The Influence of the Support Structure on Residual Stress and Distortion in SLM Inconel 718 Parts journal May 2018
Additive Manufacturing of Nickel Superalloys: Opportunities for Innovation and Challenges Related to Qualification journal June 2018
Residual stress evaluation of components produced via direct metal laser sintering journal March 2018
Effect of miniaturization and surface roughness on the mechanical properties of the electron beam melted superalloy Inconel®718 journal October 2019
Additive manufacturing technique-designed metallic porous implants for clinical application in orthopedics journal January 2018
Additive manufacturing of metallic components by selective electron beam melting — a review journal March 2016
Residual stress measurements of laser metal deposited Ti-6Al-4V parts using neutron diffraction journal November 2018
Residual Stress in Additive Manufactured Nickel Alloy 625 Parts journal March 2018
The Effect of EBM Process Parameters on Porosity and Microstructure of Ti-5Al-5Mo-5V-1Cr-1Fe Alloy journal April 2019
Grain Structure Control of Additively Manufactured Metallic Materials journal November 2017
Effects of Electropolishing on Mechanical Properties and Bio-Corrosion of Ti6Al4V Fabricated by Electron Beam Melting Additive Manufacturing journal May 2019
Structure, Texture and Phases in 3D Printed IN718 Alloy Subjected to Homogenization and HIP Treatments journal May 2017
Additive Manufacturing of Alloy 718 via Electron Beam Melting: Effect of Post-Treatment on the Microstructure and the Mechanical Properties journal December 2018
Strategy of Residual Stress Determination on Selective Laser Melted Al Alloy Using XRD journal January 2020