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Fatigue assessment of as-built and heat treated Inconel 718 specimens produced by additive manufacturing including notch effects
  • Klas SolbergOrcid,
  • Di Wan,
  • Filippo Berto
Klas Solberg
Orcid
Norges teknisk-naturvitenskapelige universitet
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Di Wan
NTNU
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Filippo Berto
Norwegian University of Science and Technology
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Peer review status:ACCEPTED

02 Apr 2020Submitted to Fatigue & Fracture of Engineering Materials & Structures
03 Apr 2020Submission Checks Completed
03 Apr 2020Assigned to Editor
08 Apr 2020Reviewer(s) Assigned
08 May 2020Review(s) Completed, Editorial Evaluation Pending
29 May 2020Editorial Decision: Revise Minor
26 Jun 20201st Revision Received
27 Jun 2020Submission Checks Completed
27 Jun 2020Assigned to Editor
27 Jun 2020Reviewer(s) Assigned
29 Jun 2020Review(s) Completed, Editorial Evaluation Pending
30 Jun 2020Editorial Decision: Accept

Abstract

The fatigue behaviour of notched and unnotched specimens produced by additively manufactured Inconel 718 are analysed in the as-built and heat-treated conditions. The surfaces display high roughness and defects acting as fatigue initiation sites. In the as-built condition, fine sub-grains were found, while in the heat-treated state, the sub-grains were removed and the dislocation density recovered. SN-curves are predicted based on tensile properties, hardness and defects obtained by fractography, using the √area-method.