Monte Carlo study of decorated dislocation loops in FeNiMnCu model alloys

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Monte Carlo study of decorated dislocation loops in FeNiMnCu model alloys. / Bonny, Giovanni; Terentyev, Dmitry; Zhurkin, Evgeny; Malerba, Lorenzo; Bakaev, Alexander (Peer reviewer).

In: Journal of Nuclear Materials, Vol. 452, 02.06.2014, p. 486-492.

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@article{c4ceeed93fd643c0900afeb4e5e3037e,
title = "Monte Carlo study of decorated dislocation loops in FeNiMnCu model alloys",
abstract = "Radiation-induced embrittlement of bainitic steels is the lifetime limiting factor of reactor pressure vessels in existing nuclear light water reactors. The primary mechanism of embrittlement is the obstruction of dislocation motion by nano-metric defects in the bulk of the material due to irradiation. Such features are known to be solute clusters that may be attached to point defect clusters. In this work we study the thermal stability of solute clusters near edge dislocation lines and loops with Burgers vector b=½ [111] and b=[100] in FeNiMnCu model alloys by means of Metropolis Monte Carlo simulations. It is concluded that small dislocation loops may indeed act as points for heterogeneous nucleation of solute precipitates in reactor pressure vessel steels and increase their thermodynamic stability up to and above normal reactor operating temperatures. We also found that, in the presence of dislocation-type defects, the Ni content determines the thermodynamic driving force for precipitation, rather than the Mn content.",
keywords = "Monte Carlo, reactor pressure vessel steels, dislocation loop",
author = "Giovanni Bonny and Dmitry Terentyev and Evgeny Zhurkin and Lorenzo Malerba and Alexander Bakaev",
note = "Score = 10",
year = "2014",
month = "6",
day = "2",
doi = "10.1016/j.jnucmat.2014.05.051",
language = "English",
volume = "452",
pages = "486--492",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Monte Carlo study of decorated dislocation loops in FeNiMnCu model alloys

AU - Bonny, Giovanni

AU - Terentyev, Dmitry

AU - Zhurkin, Evgeny

AU - Malerba, Lorenzo

A2 - Bakaev, Alexander

N1 - Score = 10

PY - 2014/6/2

Y1 - 2014/6/2

N2 - Radiation-induced embrittlement of bainitic steels is the lifetime limiting factor of reactor pressure vessels in existing nuclear light water reactors. The primary mechanism of embrittlement is the obstruction of dislocation motion by nano-metric defects in the bulk of the material due to irradiation. Such features are known to be solute clusters that may be attached to point defect clusters. In this work we study the thermal stability of solute clusters near edge dislocation lines and loops with Burgers vector b=½ [111] and b=[100] in FeNiMnCu model alloys by means of Metropolis Monte Carlo simulations. It is concluded that small dislocation loops may indeed act as points for heterogeneous nucleation of solute precipitates in reactor pressure vessel steels and increase their thermodynamic stability up to and above normal reactor operating temperatures. We also found that, in the presence of dislocation-type defects, the Ni content determines the thermodynamic driving force for precipitation, rather than the Mn content.

AB - Radiation-induced embrittlement of bainitic steels is the lifetime limiting factor of reactor pressure vessels in existing nuclear light water reactors. The primary mechanism of embrittlement is the obstruction of dislocation motion by nano-metric defects in the bulk of the material due to irradiation. Such features are known to be solute clusters that may be attached to point defect clusters. In this work we study the thermal stability of solute clusters near edge dislocation lines and loops with Burgers vector b=½ [111] and b=[100] in FeNiMnCu model alloys by means of Metropolis Monte Carlo simulations. It is concluded that small dislocation loops may indeed act as points for heterogeneous nucleation of solute precipitates in reactor pressure vessel steels and increase their thermodynamic stability up to and above normal reactor operating temperatures. We also found that, in the presence of dislocation-type defects, the Ni content determines the thermodynamic driving force for precipitation, rather than the Mn content.

KW - Monte Carlo

KW - reactor pressure vessel steels

KW - dislocation loop

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_135646

UR - http://knowledgecentre.sckcen.be/so2/bibref/11578

U2 - 10.1016/j.jnucmat.2014.05.051

DO - 10.1016/j.jnucmat.2014.05.051

M3 - Article

VL - 452

SP - 486

EP - 492

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

ER -

ID: 206348