Nanostructure evolution under irradiation in FeMnNi alloys: A ‘‘grey alloy’’ object kinetic Monte Carlo model

Research output: Contribution to journalArticle

Standard

Nanostructure evolution under irradiation in FeMnNi alloys: A ‘‘grey alloy’’ object kinetic Monte Carlo model. / Chiapetto, Monica; Malerba, Lorenzo; Becquart, Charlotte; Castin, Nicolas (Peer reviewer).

In: Journal of Nuclear Materials, Vol. 462, No. 2015, 04.2015, p. 91-99.

Research output: Contribution to journalArticle

Bibtex - Download

@article{5f82c7a1d4574fa497099475d5366086,
title = "Nanostructure evolution under irradiation in FeMnNi alloys: A ‘‘grey alloy’’ object kinetic Monte Carlo model",
abstract = "This work extends the object kinetic Monte Carlo model for neutron irradiation-induced nanostructure evolution in Fe–C binary alloys, introducing the effects of substitutional solutes like Mn and Ni. The objective is to develop a model able to describe the nanostructural evolution of both vacancy and self-interstitial atom (SIA) defect cluster populations in Fe(C)MnNi neutron-irradiated alloys at the operational temperature of light water reactors, by simulating specific reference experiments. To do this, the effects of the substitutional solutes of interest are introduced, under simplifying assumptions, using a ‘‘grey alloy’’ scheme. Mn and Ni solute atoms are not explicitly present in the model, but their effect is introduced by modifying the parameters that govern the mobility of the defect clusters. In particular, the reduction of the mobility of point-defect clusters as a consequence of the presence of solutes proved to be key to explain the experimentally observed disappearance of detectable defect clusters with increasing solute content. Solute concentration is explicitly taken into account in the model as a variable determining the slowing down of self-interstitial clusters; small vacancy clusters are assumed to be significantly slowed down by the presence of solutes, while for clusters bigger than 10 vacancies complete immobility is postulated.",
keywords = "Object kinetic Monte Carlo, FeMnNi, neutron irradiation, nanostructural evolution",
author = "Monica Chiapetto and Lorenzo Malerba and Charlotte Becquart and Nicolas Castin",
note = "Score = 10",
year = "2015",
month = "4",
doi = "10.1016/j.jnucmat.2015.03.045",
language = "English",
volume = "462",
pages = "91--99",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",
number = "2015",

}

RIS - Download

TY - JOUR

T1 - Nanostructure evolution under irradiation in FeMnNi alloys: A ‘‘grey alloy’’ object kinetic Monte Carlo model

AU - Chiapetto, Monica

AU - Malerba, Lorenzo

AU - Becquart, Charlotte

A2 - Castin, Nicolas

N1 - Score = 10

PY - 2015/4

Y1 - 2015/4

N2 - This work extends the object kinetic Monte Carlo model for neutron irradiation-induced nanostructure evolution in Fe–C binary alloys, introducing the effects of substitutional solutes like Mn and Ni. The objective is to develop a model able to describe the nanostructural evolution of both vacancy and self-interstitial atom (SIA) defect cluster populations in Fe(C)MnNi neutron-irradiated alloys at the operational temperature of light water reactors, by simulating specific reference experiments. To do this, the effects of the substitutional solutes of interest are introduced, under simplifying assumptions, using a ‘‘grey alloy’’ scheme. Mn and Ni solute atoms are not explicitly present in the model, but their effect is introduced by modifying the parameters that govern the mobility of the defect clusters. In particular, the reduction of the mobility of point-defect clusters as a consequence of the presence of solutes proved to be key to explain the experimentally observed disappearance of detectable defect clusters with increasing solute content. Solute concentration is explicitly taken into account in the model as a variable determining the slowing down of self-interstitial clusters; small vacancy clusters are assumed to be significantly slowed down by the presence of solutes, while for clusters bigger than 10 vacancies complete immobility is postulated.

AB - This work extends the object kinetic Monte Carlo model for neutron irradiation-induced nanostructure evolution in Fe–C binary alloys, introducing the effects of substitutional solutes like Mn and Ni. The objective is to develop a model able to describe the nanostructural evolution of both vacancy and self-interstitial atom (SIA) defect cluster populations in Fe(C)MnNi neutron-irradiated alloys at the operational temperature of light water reactors, by simulating specific reference experiments. To do this, the effects of the substitutional solutes of interest are introduced, under simplifying assumptions, using a ‘‘grey alloy’’ scheme. Mn and Ni solute atoms are not explicitly present in the model, but their effect is introduced by modifying the parameters that govern the mobility of the defect clusters. In particular, the reduction of the mobility of point-defect clusters as a consequence of the presence of solutes proved to be key to explain the experimentally observed disappearance of detectable defect clusters with increasing solute content. Solute concentration is explicitly taken into account in the model as a variable determining the slowing down of self-interstitial clusters; small vacancy clusters are assumed to be significantly slowed down by the presence of solutes, while for clusters bigger than 10 vacancies complete immobility is postulated.

KW - Object kinetic Monte Carlo

KW - FeMnNi

KW - neutron irradiation

KW - nanostructural evolution

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_138918

UR - http://knowledgecentre.sckcen.be/so2/bibref/12438

U2 - 10.1016/j.jnucmat.2015.03.045

DO - 10.1016/j.jnucmat.2015.03.045

M3 - Article

VL - 462

SP - 91

EP - 99

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - 2015

ER -

ID: 64060