PBF-LB/M of Inconel X-750: Correlation between crystallographic features, microstructural evolution, and processing parameters
de Souza Pinto Pereira A, Volpato GM, Schlick G, Babinský T, Ott B, Felfer P, Landesberger M, Glatzel U, Tetzlaff U (2026)
Publication Type: Journal article
Publication year: 2026
Journal
Book Volume: 1062
Article Number: 187519
DOI: 10.1016/j.jallcom.2026.187519
Abstract
Processing polycrystalline Ni-base superalloys with powder bed fusion using a laser beam (PBF-LB/M) is highly relevant for the transport and energy sectors. Inconel alloys 718, 625, and 939 have been the focus of most research efforts, however, these alloys differ from Inconel X-750. Three aspects were approached in the current work: processability, statistical correlations, and a detailed description of the resulting microstructure. FE-SEM-EBSD, STEM-EDS, and APT were used in addition to the usual methods for additive manufacturing parts. The role of dislocations in the precipitation of primary γ′ for was found as secondary for this alloy, while the local chemical composition is the likely leading factor. Such is the case that no correlation between the geometrically necessary dislocations (GND) and other quantities. Evidence was found regarding the impact of grain boundary misorientation on the precipitation of η-phase. The effect of the precipitation of the η-phase on primary and secondary γ′ precipitates is described, as a difference in the chemical composition of both γ′ precipitates was detected. Lastly, the quantification of the γ, γ′ and η-phases for AM Inconel X-750, performed through image analysis and H-XRD, is reported here for the first time.
Authors with CRIS profile
Benedict Ott
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Peter Felfer
Professur für Atom Probe Tomography
Involved external institutions
Technische Hochschule Ingolstadt
Germany (DE)
Universität Bayreuth
Germany (DE)
Fraunhofer-Institut für Gießerei-, Composite- und Verarbeitungstechnik (IGCV) / Fraunhofer Research Institution for Casting, Composite and Processing Technology
Germany (DE)
Institute of Physics of Materials
Czech Republic (CZ)
Germany (DE)
Universität Bayreuth
Germany (DE)
Fraunhofer-Institut für Gießerei-, Composite- und Verarbeitungstechnik (IGCV) / Fraunhofer Research Institution for Casting, Composite and Processing Technology
Germany (DE)
Institute of Physics of Materials
Czech Republic (CZ)
How to cite
APA:
de Souza Pinto Pereira, A., Volpato, G.M., Schlick, G., Babinský, T., Ott, B., Felfer, P.,... Tetzlaff, U. (2026). PBF-LB/M of Inconel X-750: Correlation between crystallographic features, microstructural evolution, and processing parameters. Journal of Alloys and Compounds, 1062. https://doi.org/10.1016/j.jallcom.2026.187519
MLA:
de Souza Pinto Pereira, Adriano, et al. "PBF-LB/M of Inconel X-750: Correlation between crystallographic features, microstructural evolution, and processing parameters." Journal of Alloys and Compounds 1062 (2026).
BibTeX: Download