The effect of γ matrix channel width on the compositional evolution in a multi-component nickel-based superalloy
Saksena A, Kubacka D, Gault B, Spiecker E, Kontis P (2022)
Publication Type: Journal article
Publication year: 2022
Journal
Book Volume: 219
Article Number: 114853
DOI: 10.1016/j.scriptamat.2022.114853
Abstract
High-temperature diffusion affects the long-term stability of superalloys and hence their service life. Yet, details of the mechanisms remain elusive. Here, the γ-γʹ microstructure itself is used as a nanoscale diffusion couple to study the diffusion of alloying elements within narrow and wide γ channels during annealing for up to 100 h at 750 °C in a nickel-based superalloy. Predictions from thermodynamic and kinetic calculations are compared to near-atomic experimental measurements as a function of the γ channel width. An overlooked width-dependence of compositional evolution is revealed that may directly affect the microstructural and compositional predictions of service life of nickel-based superalloys.
Authors with CRIS profile
Dorota Kubacka
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Erdmann Spiecker
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Additional Organisation(s)
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Involved external institutions
Germany (DE)How to cite
APA:
Saksena, A., Kubacka, D., Gault, B., Spiecker, E., & Kontis, P. (2022). The effect of γ matrix channel width on the compositional evolution in a multi-component nickel-based superalloy. Scripta Materialia, 219. https://doi.org/10.1016/j.scriptamat.2022.114853
MLA:
Saksena, Aparna, et al. "The effect of γ matrix channel width on the compositional evolution in a multi-component nickel-based superalloy." Scripta Materialia 219 (2022).
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