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Additive Manufacturing of Powdery Ni-Based Superalloys Mar-M-247 and CM 247 LC in Hybrid Laser Metal Deposition
Fraunhofer-Institute for Material and Beam Technology, Dresden, Germany.
Fraunhofer-Institute for Material and Beam Technology, Dresden, Germany.
Technische Universität Dresden, Dresden, Germany .
Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, Dresden, Germany .
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2018 (English)In: Metallurgical and Materials Transactions. A, ISSN 1073-5623, E-ISSN 1543-1940, Vol. 49, no 9, p. 3812-3830Article in journal (Refereed) Published
Abstract [en]

The present paper addresses the phenomena of hot cracking of nickel-based superalloys in the perspective of hybrid Laser Metal Deposition (combined application of induction and laser). This includes an extract of relevant theoretical considerations and the deduction of the tailored approach which interlinks material–scientific aspects with state-of-the-art manufacturing engineering. The experimental part reflects the entire process chain covering the manufacturing strategy, important process parameters, the profound analysis of the used materials, the gradual process development, and the corresponding hybrid manufacture of parts. Furthermore, hot isostatic pressing and thermal treatment are addressed as well as tensile testing at elevated temperatures. Further investigations include X-ray CT measurements, electron backscattered diffraction (EBSD), and scanning electron microscopy (SEM) as well as light optical microscope evaluation. The fundamental results prove the reliable processibility of the high-performance alloys Mar-M-247 and Alloy 247 LC and describe in detail the process inherent microstructure. This includes the grain size and orientation as well as the investigation of size, shape, and distribution of the γ′ precipitates and carbides. Based on these findings, the manufacturing of more complex demonstrator parts with representative dimensions is addressed as well. This includes the selection of a typical application, the transfer of the strategy, as well as the proof of concept.

Place, publisher, year, edition, pages
Springer, 2018. Vol. 49, no 9, p. 3812-3830
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-70134DOI: 10.1007/s11661-018-4777-yOAI: oai:DiVA.org:ltu-70134DiVA, id: diva2:1233725
Note

Validerad;2018;Nivå 2;2018-08-09 (andbra)

Available from: 2018-07-19 Created: 2018-07-19 Last updated: 2018-08-09Bibliographically approved

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Brueckner, Frank

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