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Additive Manufacturing of β-NiAl by Means of Laser Metal Deposition of Pre-Alloyed and Elemental Powders
Department of Additive Manufacturing and Printing, Fraunhofer Institute for Material and Beam Technology, Winterbergstraβe 28, 01277 Dresden, Germany; Faculty of Mechanical Science and Engineering, Institute of Materials Science, Dresden University of Technology, Helmholtzstr. 7, 01069 Dresden, Germany .
Department of Additive Manufacturing and Printing, Fraunhofer Institute for Material and Beam Technology, Winterbergstraβe 28, 01277 Dresden, Germany.
Department of Additive Manufacturing and Printing, Fraunhofer Institute for Material and Beam Technology, Winterbergstraβe 28, 01277 Dresden, Germany.
Department of Additive Manufacturing and Printing, Fraunhofer Institute for Material and Beam Technology, Winterbergstraβe 28, 01277 Dresden, Germany.
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2021 (English)In: Materials, E-ISSN 1996-1944, Vol. 14, no 9, article id 2246Article in journal (Refereed) Published
Abstract [en]

The additive manufacturing (AM) technique, laser metal deposition (LMD), combines the advantages of near net shape manufacturing, tailored thermal process conditions and in situ alloy modification. This makes LMD a promising approach for the processing of advanced materials, such as intermetallics. Additionally, LMD allows the composition of a powder blend to be modified in situ. Hence, alloying and material build-up can be achieved simultaneously. Within this contribution, AM processing of the promising high-temperature material β-NiAl, by means of LMD, with elemental powder blends, as well as with pre-alloyed powders, was presented. The investigations showed that by applying a preheating temperature of 1100 °C, β-NiAl could be processed without cracking. Additionally, by using pre-alloyed, as well as elemental powders, a single phase β-NiAl microstructure can be achieved in multi-layer build-ups. Major differences between the approaches were found within substrate near regions. For in situ alloying of Ni and Al, these regions are characterized by an inhomogeneous elemental distribution in a layerwise manner. However, due to the remelting of preceding layers during deposition, a homogenization can be observed, leading to a single-phase structure. This shows the potential of high temperature preheating and in situ alloying to push the development of new high temperature materials for AM.

Place, publisher, year, edition, pages
MDPI, 2021. Vol. 14, no 9, article id 2246
Keywords [en]
additive manufacturing, laser metal deposition, nickel aluminide, intermetallics, advanced materials
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-84095DOI: 10.3390/ma14092246ISI: 000650593200001PubMedID: 33925481Scopus ID: 2-s2.0-85105638053OAI: oai:DiVA.org:ltu-84095DiVA, id: diva2:1548961
Note

Validerad;2021;Nivå 2;2021-05-04 (alebob);

Finansiär: Fraunhofer internal research program FutureAM

Available from: 2021-05-04 Created: 2021-05-04 Last updated: 2024-07-04Bibliographically approved

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Brückner, Frank

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