Compositionally-tailored steel-based materials manufactured by electron beam melting using blended pre-alloyed powders

Andrey Koptyug, Vladimir V. Popov, Carlos Alberto Botero Vega, Emilio Jiménez-Piqué, Alexander Katz-Demyanetz, Lars Erik Rännar, Mikael Bäckström

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The paper presents the prospects of additive manufacturing (AM) in metal, using the powder bed fusion (PBF) method Electron Beam Melting (EBM) in fabrication specific steel-based alloys for different applications. The proposed approach includes manufacturing of metals from blended pre-alloyed powders for achieving in situ alloying and the material microstructure tailoring by controlling electron beam energy deposition rate EBM tests were conducted with the blends of 316L stainless steel and Colferoloys 103 and 139, corrosion- and abrasion-resistant iron based materials commonly used for plasma spray coating. Thorough microstructure analysis of the manufactured sample was carried out using electron microscopy and measurements of microhardness and elastic modulus was carried out using nanoindentation. It is concluded that implementation of blended powder pathway in PBF AM allows to widen the scope of available materials through diminishing the dependence on the availability of pre-alloyed powders. Together with beam energy steering this pathway also allows for an effective sample microstructure control at different dimensional scales, resulting in components with unique properties. Therefore, the implementation of ‘blended powder pathway’ in PBF AM provides a possibility of manufacturing components with the composite-like and homogeneous zones allowing for the microstructure control and effectively adding a “4th dimension” to “3D printing".

Original languageEnglish
Article number138587
JournalMaterials Science and Engineering A
Volume771
DOIs
Publication statusPublished - 13 Jan 2020
Externally publishedYes

Keywords

  • Additive manufacturing
  • Blended powder
  • EBM
  • Electron beam melting
  • Graded material
  • In situ alloying

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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