Investigation of process-geometry-microstructure-properties relationships in Inconel 718 single-bead deposits using wire based laser metal deposition
Mabrouk DERGUINI, Yannick BALCAEN, Morgane MOKHTARI, Joël ALEXIS
Abstract. Additive manufacturing techniques offer new possibilities for producing overly complex parts in small batches for rapid prototyping. This study focuses on the Laser Wire Metal Deposition (LMD-w) additive manufacturing of the nickel-based superalloy Inconel 718®. This study investigates the influence of process parameters on the geometry, microstructure, and mechanical properties of single-bead deposits produced via LMD-w. Forty single tracks were successfully printed following a partial Taguchi experimental design. This process shows a wide range of processability with excellent material health. Results demonstrate that the feed factor is the key parameter to control bead geometry. In contrast, secondary dendrite arm spacing (SDAS) is controlled by travel speed (higher travel speeds promoting finer dendritic structures). Additionally, a strong correlation is established between the increase of process energy input and the solidification rate, leading to a thinner microstructure and higher hardness.
Keywords
LMD-w, Laser-Wire, Inconel 718 Superalloy, Additive Manufacturing
Published online 5/7/2025, 10 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Mabrouk DERGUINI, Yannick BALCAEN, Morgane MOKHTARI, Joël ALEXIS, Investigation of process-geometry-microstructure-properties relationships in Inconel 718 single-bead deposits using wire based laser metal deposition, Materials Research Proceedings, Vol. 54, pp 39-48, 2025
DOI: https://doi.org/10.21741/9781644903599-5
The article was published as article 5 of the book Material Forming
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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