Interaction of an edge dislocation with Cu–Ni-vacancy clusters in bcc iron

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Interaction of an edge dislocation with Cu–Ni-vacancy clusters in bcc iron. / Terentyev, Dmitry; Malerba, Lorenzo; Bonny, Giovanni; AlMotasem, Ahmed Tamer; Posselt, Matthias.

In: Journal of Nuclear Materials, Vol. 419, No. 1-3, 24.08.2011, p. 134-139.

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Terentyev, Dmitry ; Malerba, Lorenzo ; Bonny, Giovanni ; AlMotasem, Ahmed Tamer ; Posselt, Matthias. / Interaction of an edge dislocation with Cu–Ni-vacancy clusters in bcc iron. In: Journal of Nuclear Materials. 2011 ; Vol. 419, No. 1-3. pp. 134-139.

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@article{c0f596e87cdc47e087272a63789a1bf2,
title = "Interaction of an edge dislocation with Cu–Ni-vacancy clusters in bcc iron",
abstract = "In this work we studied the interaction of a ½{110} edge dislocation with Cu-rich precipitates, mimicking those that are known to form in RPV steels. We have applied a combination of Monte Carlo and molecular dynamics techniques to explore the structure and obstacle strength of Cu–Ni-vacancy clusters of nanometric size below the resolution limit of transmission electron microscopy. The results show that the strength of Cu-vacancy, Cu–Ni and Cu–Ni-vacancy clusters is comparable or even smaller than that of pure Cu clusters, but considerably smaller than the strength of pure vacancy clusters or nanovoids. Thus, the enrichment of small Cu precipitates by Ni atoms and/or a small amount of vacancies does not increase their obstacle strength, at least in the case of edge dislocations.",
keywords = "dislocation, RPV steel, hardening",
author = "Dmitry Terentyev and Lorenzo Malerba and Giovanni Bonny and AlMotasem, {Ahmed Tamer} and Matthias Posselt",
note = "Score=10",
year = "2011",
month = aug,
day = "24",
doi = "10.1016/j.jnucmat.2011.08.021",
language = "English",
volume = "419",
pages = "134--139",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",
number = "1-3",

}

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TY - JOUR

T1 - Interaction of an edge dislocation with Cu–Ni-vacancy clusters in bcc iron

AU - Terentyev, Dmitry

AU - Malerba, Lorenzo

AU - Bonny, Giovanni

AU - AlMotasem, Ahmed Tamer

AU - Posselt, Matthias

N1 - Score=10

PY - 2011/8/24

Y1 - 2011/8/24

N2 - In this work we studied the interaction of a ½{110} edge dislocation with Cu-rich precipitates, mimicking those that are known to form in RPV steels. We have applied a combination of Monte Carlo and molecular dynamics techniques to explore the structure and obstacle strength of Cu–Ni-vacancy clusters of nanometric size below the resolution limit of transmission electron microscopy. The results show that the strength of Cu-vacancy, Cu–Ni and Cu–Ni-vacancy clusters is comparable or even smaller than that of pure Cu clusters, but considerably smaller than the strength of pure vacancy clusters or nanovoids. Thus, the enrichment of small Cu precipitates by Ni atoms and/or a small amount of vacancies does not increase their obstacle strength, at least in the case of edge dislocations.

AB - In this work we studied the interaction of a ½{110} edge dislocation with Cu-rich precipitates, mimicking those that are known to form in RPV steels. We have applied a combination of Monte Carlo and molecular dynamics techniques to explore the structure and obstacle strength of Cu–Ni-vacancy clusters of nanometric size below the resolution limit of transmission electron microscopy. The results show that the strength of Cu-vacancy, Cu–Ni and Cu–Ni-vacancy clusters is comparable or even smaller than that of pure Cu clusters, but considerably smaller than the strength of pure vacancy clusters or nanovoids. Thus, the enrichment of small Cu precipitates by Ni atoms and/or a small amount of vacancies does not increase their obstacle strength, at least in the case of edge dislocations.

KW - dislocation

KW - RPV steel

KW - hardening

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_117609

U2 - 10.1016/j.jnucmat.2011.08.021

DO - 10.1016/j.jnucmat.2011.08.021

M3 - Article

VL - 419

SP - 134

EP - 139

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - 1-3

ER -

ID: 188710