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  The effect of γ matrix channel width on the compositional evolution in a multi-component nickel-based superalloy

Saksena, A., Kubacka, D., Gault, B., Spieker, 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: 114853. doi:10.1016/j.scriptamat.2022.114853.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000A-A336-1 Version Permalink: https://hdl.handle.net/21.11116/0000-000A-A338-F
Genre: Journal Article

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 Creators:
Saksena, Aparna1, 2, Author           
Kubacka, Dorota3, 4, Author
Gault, Baptiste5, 6, Author           
Spieker, Erdmann3, 4, Author
Kontis, Paraskevas1, 7, Author           
Affiliations:
1High Performance Alloys for Extreme Environments, Project Groups, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3243051              
2Hydrogen Embrittlement in High Performance Alloys, Interdepartmental and Partner Groups, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3341923              
3Institute of Micro- and Nanostructure Research (IMN) and Center for Nanoanalysis and Electron Microscopy (CENEM), Friedrich-Alexander-University, Erlangen-Nürnberg, , ou_persistent22              
4Interdisciplinary Center for Nanostructured Films (IZNF), Cauerstraße 3, Erlangen 91058, Germany, ou_persistent22              
5Atom Probe Tomography, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863384              
6Imperial College, Royal School of Mines, Department of Materials, London, SW7 2AZ, UK, ou_persistent22              
7Department of Materials Science and Engineering, NTNU Norwegian University of Science and Technology, Trondheim 7034, Norway, ou_persistent22              

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 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.

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Language(s): eng - English
 Dates: 2022-06-102022-10
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.scriptamat.2022.114853
 Degree: -

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Title: Scripta Materialia
  Abbreviation : Scripta Mater.
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 219 Sequence Number: 114853 Start / End Page: - Identifier: ISSN: 1359-6462
CoNE: https://pure.mpg.de/cone/journals/resource/954926243506