The origin of jerky dislocation motion in high-entropy alloys
Daniel Utt,
Subin Lee,
Yaolong Xing,
Hyejin Jeong,
Alexander Stukowski,
Sang Ho Oh (),
Gerhard Dehm () and
Karsten Albe ()
Additional contact information
Daniel Utt: Technische Universität Darmstadt
Subin Lee: Max-Planck-Institut für Eisenforschung GmbH
Yaolong Xing: Sungkyunkwan University
Hyejin Jeong: Sungkyunkwan University
Alexander Stukowski: Technische Universität Darmstadt
Sang Ho Oh: Sungkyunkwan University
Gerhard Dehm: Max-Planck-Institut für Eisenforschung GmbH
Karsten Albe: Technische Universität Darmstadt
Nature Communications, 2022, vol. 13, issue 1, 1-11
Abstract:
Abstract Dislocations in single-phase concentrated random alloys, including high-entropy alloys (HEAs), repeatedly encounter pinning during glide, resulting in jerky dislocation motion. While solute-dislocation interaction is well understood in conventional alloys, the origin of individual pinning points in concentrated random alloys is a matter of debate. In this work, we investigate the origin of dislocation pinning in the CoCrFeMnNi HEA. In-situ transmission electron microscopy studies reveal wavy dislocation lines and a jagged glide motion under external loading, even though no segregation or clustering is found around Shockley partial dislocations. Atomistic simulations reproduce the jerky dislocation motion and link the repeated pinning to local fluctuations in the Peierls friction. We demonstrate that the density of high local Peierls friction is proportional to the critical stress required for dislocation glide and the dislocation mobility.
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:
Downloads: (external link)
https://www.nature.com/articles/s41467-022-32134-1 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:13:y:2022:i:1:d:10.1038_s41467-022-32134-1
Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/
DOI: 10.1038/s41467-022-32134-1
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 ().