• Open Access

Interplay of Chemistry and Faceting at Grain Boundaries in a Model Al Alloy

Huan Zhao, Liam Huber, Wenjun Lu, Nicolas J. Peter, Dayong An, Frédéric De Geuser, Gerhard Dehm, Dirk Ponge, Jörg Neugebauer, Baptiste Gault, and Dierk Raabe
Phys. Rev. Lett. 124, 106102 – Published 9 March 2020
PDFHTMLExport Citation

Abstract

The boundary between two crystal grains can decompose into arrays of facets with distinct crystallographic character. Faceting occurs to minimize the system’s free energy, i.e., when the total interfacial energy of all facets is below that of the topologically shortest interface plane. In a model Al-Zn-Mg-Cu alloy, we show that faceting occurs at investigated grain boundaries and that the local chemistry is strongly correlated with the facet character. The self-consistent coevolution of facet structure and chemistry leads to the formation of periodic segregation patterns of 5–10 nm, or to preferential precipitation. This study shows that segregation-faceting interplay is not limited to bicrystals but exists in bulk engineering Al alloys and hence affects their performance.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 5 September 2019
  • Accepted 2 January 2020

DOI:https://doi.org/10.1103/PhysRevLett.124.106102

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Open access publication funded by the Max Planck Society.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsInterdisciplinary Physics

Authors & Affiliations

Huan Zhao1,*, Liam Huber1, Wenjun Lu1,†, Nicolas J. Peter1, Dayong An1, Frédéric De Geuser2, Gerhard Dehm1, Dirk Ponge1, Jörg Neugebauer1, Baptiste Gault1,3,‡, and Dierk Raabe1

  • 1Max-Planck-Institut für Eisenforschung, Max-Planck-Straβe 1, 40237 Düsseldorf, Germany
  • 2Université Grenoble Alpes, CNRS, Grenoble INP, SIMaP, F-38000 Grenoble, France
  • 3Department of Materials, Royal School of Mines, Imperial College London, London SW7 2AZ, United Kingdom

  • *Corresponding author. h.zhao@mpie.de
  • Corresponding author. w.lu@mpie.de
  • Corresponding author. b.gault@mpie.de

Article Text

Click to Expand

Supplemental Material

Click to Expand

References

Click to Expand
Issue

Vol. 124, Iss. 10 — 13 March 2020

Reuse & Permissions
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Reuse & Permissions

It is not necessary to obtain permission to reuse this article or its components as it is available under the terms of the Creative Commons Attribution 4.0 International license. This license permits unrestricted use, distribution, and reproduction in any medium, provided attribution to the author(s) and the published article's title, journal citation, and DOI are maintained. Please note that some figures may have been included with permission from other third parties. It is your responsibility to obtain the proper permission from the rights holder directly for these figures.

×

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×