Secondary grain boundary dislocations alter segregation energy spectra

Xinren Chen, William Gonçalves, Yi Hu, Yipeng Gao, Patrick Harrison, Gerhard Dehm, Baptiste Gault, Wolfgang Ludwig, Edgar Rauch, Xuyang Zhou () and Dierk Raabe
Additional contact information
Xinren Chen: Max-Planck-Institut for Sustainable Materials
William Gonçalves: Université Lyon I, MATEIS, INSA Lyon, CNRS UMR 5510
Yi Hu: Max-Planck-Institut for Sustainable Materials
Yipeng Gao: Max-Planck-Institut for Sustainable Materials
Patrick Harrison: Université Grenoble Alpes
Gerhard Dehm: Max-Planck-Institut for Sustainable Materials
Baptiste Gault: Max-Planck-Institut for Sustainable Materials
Wolfgang Ludwig: Université Lyon I, MATEIS, INSA Lyon, CNRS UMR 5510
Edgar Rauch: Université Grenoble Alpes
Xuyang Zhou: Max-Planck-Institut for Sustainable Materials
Dierk Raabe: Max-Planck-Institut for Sustainable Materials

Nature Communications, 2025, vol. 16, issue 1, 1-12

Abstract: Abstract Grain boundaries (GBs) trigger structure-specific chemical segregation of solute atoms. According to the three-dimensional (3D) topology of grains, GBs - although defined as two-dimensional defects - cannot practically be free of curvature. This leads to discrete variations in the GB plane orientations. Topologically required arrays of secondary GB dislocations accommodate these variations as well as deviations from ideal coincidence site lattice GBs. We report here that these pattern-forming secondary GB dislocations can have an additional and, in some cases, even a much stronger effect on GB segregation than defect-free GBs. Using nanoscale correlative tomography combining crystallography and chemical analysis, we quantified the relationship between secondary GB dislocations and their segregation energy spectra for a model Fe-W alloy. This discovery unlocks design opportunities for advanced materials, leveraging the additional degrees of freedom provided by topologically-necessary secondary GB dislocations to modulate segregation.

Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-025-64265-6 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-64265-6

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-025-64265-6

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().