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Compositionally-tailored steel-based materials manufactured by electron beam melting using blended pre-alloyed powders
Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering. (SportsTech Research Centre)ORCID iD: 0000-0003-2964-9500
Israel Institute of Metals, Haifa, Israel.
(SportsTech Research Centre)
Universitat Politècnica de Catalunya, Barcelona, Spain.
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2020 (English)In: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 771, article id 138587Article in journal (Refereed) Published
Abstract [en]

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". 

Place, publisher, year, edition, pages
2020. Vol. 771, article id 138587
Keywords [en]
Additive manufacturing, Blended powder, EBM, Electron beam melting, Graded material, In situ alloying
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:miun:diva-37689DOI: 10.1016/j.msea.2019.138587Scopus ID: 2-s2.0-85074019741OAI: oai:DiVA.org:miun-37689DiVA, id: diva2:1370465
Available from: 2019-11-15 Created: 2019-11-15 Last updated: 2019-11-15Bibliographically approved

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Koptioug, AndreiBotero Vega, Carlos AlbertoRännar, Lars-ErikBäckström, Mikael

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Koptioug, AndreiBotero Vega, Carlos AlbertoRännar, Lars-ErikBäckström, Mikael
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Department of Quality Management and Mechanical Engineering
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