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Evaluation Of Additively Manufactured Test Specimens From INCONEL 718 Alloy Using Selective Laser Melting (SLM) Process

  • : Oleksii Pedash1, Nataliia Lysenko2, Volodymyr Klochikhin2, Valerii Shylo2
  • : 1JSC MOTOR SICH, 2MOTOR SICH JSC
  • : PDF Download
  • : 2017

Abstract

Composition, structure and properties of specimens made from Inconel 718 by selective laser melting (SLM) process applied in manufacture of aircraft grade parts are studied in this article. A comparison of a structure and properties of specimens subjected to a separate hot isostatic pressing (HIP), separate heat treatment, and a HIP followed by heat treatment typically used for Inconel 718 alloy has been carried out. It was found out that the best combination of mechanical properties is attained on the specimens subjected by HIP followed by heat treatment, which results in healing pores and discontinuities, γ΄΄-phase strengthening and remarkable reduction of excessive lamellar δ-phase.
 

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