Solving the Puzzle of (100) Interstitial Loop Formation in bcc Iron

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Solving the Puzzle of (100) Interstitial Loop Formation in bcc Iron. / Xu, Haixuan; Stoller, Roger E.; Osetsky, Yury N.; Terentyev, Dmitry; Bonny, Giovanni (Peer reviewer).

In: Physical review Letters, Vol. 110, 26.06.2013, p. 1-5.

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Xu, Haixuan ; Stoller, Roger E. ; Osetsky, Yury N. ; Terentyev, Dmitry ; Bonny, Giovanni. / Solving the Puzzle of (100) Interstitial Loop Formation in bcc Iron. In: Physical review Letters. 2013 ; Vol. 110. pp. 1-5.

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@article{d9998698dc244c368e807cfbec06494a,
title = "Solving the Puzzle of (100) Interstitial Loop Formation in bcc Iron",
abstract = "The interstitial loop is a unique signature of radiation damage in structural materials for nuclear and other advanced energy systems. Unlike other bcc metals, two types of interstitial loops, 1/2(111) and (100) , are formed in bcc iron and its alloys. However, the mechanism by which (100) interstitial dislocation loops are formed has remained undetermined since they were first observed more than fifty years ago. We describe our atomistic simulations that have provided the first direct observation of (100) loop formation. The process was initially observed using our self-evolving atomistic kinetic Monte Carlo method, and subsequently confirmed using molecular dynamics simulations. Formation of (100) loops involves a distinctly atomistic interaction between two 1/2(111) loops, and does not follow the conventional assumption of dislocation theory, which is Burgers vector conservation between the reactants and the product. The process observed is different from all previously proposed mechanisms. Thus, our observations might provide a direct link between experiments and simulations and new insights into defect formation that may provide a basis to increase the radiation resistance of these strategic materials.",
keywords = "Not mentioned",
author = "Haixuan Xu and Stoller, {Roger E.} and Osetsky, {Yury N.} and Dmitry Terentyev and Giovanni Bonny",
note = "Score = 10",
year = "2013",
month = "6",
day = "26",
doi = "10.1103/PhysRevLett.110.265503",
language = "English",
volume = "110",
pages = "1--5",
journal = "Physical review Letters",
issn = "0031-9007",
publisher = "APS - American Physical Society",

}

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TY - JOUR

T1 - Solving the Puzzle of (100) Interstitial Loop Formation in bcc Iron

AU - Xu, Haixuan

AU - Stoller, Roger E.

AU - Osetsky, Yury N.

AU - Terentyev, Dmitry

A2 - Bonny, Giovanni

N1 - Score = 10

PY - 2013/6/26

Y1 - 2013/6/26

N2 - The interstitial loop is a unique signature of radiation damage in structural materials for nuclear and other advanced energy systems. Unlike other bcc metals, two types of interstitial loops, 1/2(111) and (100) , are formed in bcc iron and its alloys. However, the mechanism by which (100) interstitial dislocation loops are formed has remained undetermined since they were first observed more than fifty years ago. We describe our atomistic simulations that have provided the first direct observation of (100) loop formation. The process was initially observed using our self-evolving atomistic kinetic Monte Carlo method, and subsequently confirmed using molecular dynamics simulations. Formation of (100) loops involves a distinctly atomistic interaction between two 1/2(111) loops, and does not follow the conventional assumption of dislocation theory, which is Burgers vector conservation between the reactants and the product. The process observed is different from all previously proposed mechanisms. Thus, our observations might provide a direct link between experiments and simulations and new insights into defect formation that may provide a basis to increase the radiation resistance of these strategic materials.

AB - The interstitial loop is a unique signature of radiation damage in structural materials for nuclear and other advanced energy systems. Unlike other bcc metals, two types of interstitial loops, 1/2(111) and (100) , are formed in bcc iron and its alloys. However, the mechanism by which (100) interstitial dislocation loops are formed has remained undetermined since they were first observed more than fifty years ago. We describe our atomistic simulations that have provided the first direct observation of (100) loop formation. The process was initially observed using our self-evolving atomistic kinetic Monte Carlo method, and subsequently confirmed using molecular dynamics simulations. Formation of (100) loops involves a distinctly atomistic interaction between two 1/2(111) loops, and does not follow the conventional assumption of dislocation theory, which is Burgers vector conservation between the reactants and the product. The process observed is different from all previously proposed mechanisms. Thus, our observations might provide a direct link between experiments and simulations and new insights into defect formation that may provide a basis to increase the radiation resistance of these strategic materials.

KW - Not mentioned

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_136506

UR - http://knowledgecentre.sckcen.be/so2/bibref/11746

U2 - 10.1103/PhysRevLett.110.265503

DO - 10.1103/PhysRevLett.110.265503

M3 - Article

VL - 110

SP - 1

EP - 5

JO - Physical review Letters

JF - Physical review Letters

SN - 0031-9007

ER -

ID: 346275