Nucleation burst in additively manufactured Inconel 718: 3D characterization of ISRO-induced equiaxed microstructure - Université de Lorraine Accéder directement au contenu
Article Dans Une Revue Additive Manufacturing Année : 2023

Nucleation burst in additively manufactured Inconel 718: 3D characterization of ISRO-induced equiaxed microstructure

Résumé

The origin of isosahedral short range order (ISRO)-mediated nucleation in additively manufactured Inconel 718 is investigated in this work. 3D EBSD-EDS characterisation of the equiaxed grain zone revealed a 5-fold symmetry axis emerging from the surface of a TiC particle. Using high resolution electron microscopy, the Nb 2 Ni and Ni 6 Nb 7 phases have been identified around a TiC particle for the first time in this alloy. Such phases are associated with local Nb enrichment around the TiC particles. The Nb-rich liquid and the solidification conditions of the additive manufacturing process induce the formation of phases containing a high concentration of icosahedral clusters and are thought to be the origin of ISRO-mediated nucleation in this alloy.
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Dates et versions

hal-04213243 , version 1 (21-09-2023)

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I. Cazic, Julien Zollinger, M. Engstler, J. Ghanbaja, T. Schenk, et al.. Nucleation burst in additively manufactured Inconel 718: 3D characterization of ISRO-induced equiaxed microstructure. Additive Manufacturing, 2023, 66, pp.103458. ⟨10.1016/j.addma.2023.103458⟩. ⟨hal-04213243⟩
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