Machining and heat treatment as post-processing strategies for Ni-superalloys structures fabricated using direct energy deposition

Research output: Contribution to journalArticlepeer-review

Authors

  • Francesco Careri
  • Domenico Umbrello
  • José Outeiro
  • António C. Batista

Colleges, School and Institutes

External organisations

  • Calabria University
  • University of Birmingham
  • University of Coimbra
  • HESAM Université

Abstract

The aim of this study is to determine the most suitable post-processing routines to enhance the surface integrity of components produced with Inconel 718 superalloy by additive manufacturing. The components were fabricated by Direct Energy Deposition (DED) followed by two typical post-processing methods: machining and heat treatment. The effect of the post-processing sequence (machining + heat treatment or heat treatment + machining) and the corresponding effects on the surface integrity of these components were investigated in terms of surface finishing, microstructure, micro-hardness and residual stresses. Finally, suitable solutions in terms of additive manufacturing - post-process operations have been reported.

Bibliographic note

Funding Information: The authors would like to acknowledge the European research project that funded this research. The project belongs to Horizon 2020 research and innovation programme Novel ALL-IN-ONE machines, robots and systems for affordable, worldwide and lifetime Distributed 3D hybrid manufacturing and repair operations (Project ID: 723795).

Details

Original languageEnglish
Pages (from-to)236-244
Number of pages9
JournalJournal of Manufacturing Processes
Volume61
Early online date2 Dec 2020
Publication statusPublished - Jan 2021

Keywords

  • Additive manufacturing, Machining, Surface integrity