“Conjugate Channeling” Effect in Dislocation Core Diffusion: Carbon Transport in Dislocated BCC Iron

Ishii, Akio; Li, Ju; Ogata, Shigenobu

PLoS ONE, 2013, 8(4), e60586

Number of Access:597（2025-08-15 01:09 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/89303

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Title
“Conjugate Channeling” Effect in Dislocation Core Diffusion: Carbon Transport in Dislocated BCC Iron
Creator
NRID
1000080773340 1000080773340
researchmap permalink
a_ishii a_ishii
ORCID
0000-0002-9369-6259 0000-0002-9369-6259
Scopus Author ID
7201558020 7201558020
CreatorName
Ishii, Akio
CreatorName
Li, Ju
NRID
1000020273584 1000020273584
ORCID
0000-0002-9072-4496 0000-0002-9072-4496
researchmap permalink
read0185246 read0185246
Scopus Author ID
7201796489 7201796489
CreatorName
Ogata, Shigenobu
Description
Ishii A, Li J, Ogata S (2013) “Conjugate Channeling” Effect in Dislocation Core Diffusion: Carbon Transport in Dislocated BCC Iron. PLOS ONE 8(4): e60586. https://doi.org/10.1371/journal.pone.0060586
Abstract
Dislocation pipe diffusion seems to be a well-established phenomenon. Here we demonstrate an unexpected effect, that the migration of interstitials such as carbon in iron may be accelerated not in the dislocation line direction , but in a conjugate diffusion direction. This accelerated random walk arises from a simple crystallographic channeling effect. is a function of the Burgers vector b, but not , thus a dislocation loop possesses the same everywhere. Using molecular dynamics and accelerated dynamics simulations, we further show that such dislocation-core-coupled carbon diffusion in iron has temperature-dependent activation enthalpy like a fragile glass. The 71° mixed dislocation is the only case in which we see straightforward pipe diffusion that does not depend on dislocation mobility.
Publisher
PLOS
Source Title
PLoS ONE
Volume (Issue)
8(4)
Page
e60586
Date of Issued
2013-04-11
Language
English
Handle URL
https://hdl.handle.net/11094/89303
eISSN
19326203
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1371/journal.pone.0060586
Access Rights
open access
CopyRight
© 2013 Ishii et al. This article is licensed under a Creative Commons Attribution 4.0 International License.
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Version of Record
Category
学術雑誌論文 Journal Article