Mechanisms of radiation strengthening in Fe–Cr alloys as revealed by atomistic studies

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Mechanisms of radiation strengthening in Fe–Cr alloys as revealed by atomistic studies. / Terentyev, Dmitry; Bonny, Giovanni; Domain, C.; Monnet, G.; Malerba, Lorenzo; Bakaev, Alexander (Peer reviewer).

In: Journal of Nuclear Materials, Vol. 442, No. 1-3, 11.2013, p. 470-485.

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@article{4f40a4b0c3584ac183b1d8c1919ef090,
title = "Mechanisms of radiation strengthening in Fe–Cr alloys as revealed by atomistic studies",
abstract = "A review of experimental results shows that the dependence on Cr content of radiation-induced strengthening in Fe–Cr alloys and ferritic/martensitic steels is peculiar, exhibiting an increase as soon as Cr is added, followed by a local maximum and then a local minimum. This dependence is to date unexplained. In this paper we try to rationalise it, by reviewing recent (published and unpublished) molecular dynamics simulations work, devoted to the investigation of several possible mechanisms of radiation strengthening in Fe–Cr. In particular, the following questions are addressed quantitatively: (i) Does Cr influence the glide of dislocations? If so, how? (ii) Does Cr influence the interaction between dislocations and radiation-produced defects? If so, why? The latter question involves also a study of the interaction of moving dislocations with experimentally observed Cr-enriched loops. We find that the fact of shifting from a loop-absorption (pure Fe) to a loop-non-absorption (Fe–Cr) regime, because of the Cr–enrichment of loops, contributes to explaining why Fe–Cr alloys harden more under irradiation than Fe. If, in addition, the existence of a large density of invisible and Cr-enriched loops is postulated, the origin of the effect becomes even more clear. Moreover, the different strength of 〈1 1 1)",
keywords = "Not mentioned",
author = "Dmitry Terentyev and Giovanni Bonny and C. Domain and G. Monnet and Lorenzo Malerba and Alexander Bakaev",
note = "Score = 10",
year = "2013",
month = "11",
doi = "10.1016/j.jnucmat.2013.03.054",
language = "English",
volume = "442",
pages = "470--485",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",
number = "1-3",

}

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TY - JOUR

T1 - Mechanisms of radiation strengthening in Fe–Cr alloys as revealed by atomistic studies

AU - Terentyev, Dmitry

AU - Bonny, Giovanni

AU - Domain, C.

AU - Monnet, G.

AU - Malerba, Lorenzo

A2 - Bakaev, Alexander

N1 - Score = 10

PY - 2013/11

Y1 - 2013/11

N2 - A review of experimental results shows that the dependence on Cr content of radiation-induced strengthening in Fe–Cr alloys and ferritic/martensitic steels is peculiar, exhibiting an increase as soon as Cr is added, followed by a local maximum and then a local minimum. This dependence is to date unexplained. In this paper we try to rationalise it, by reviewing recent (published and unpublished) molecular dynamics simulations work, devoted to the investigation of several possible mechanisms of radiation strengthening in Fe–Cr. In particular, the following questions are addressed quantitatively: (i) Does Cr influence the glide of dislocations? If so, how? (ii) Does Cr influence the interaction between dislocations and radiation-produced defects? If so, why? The latter question involves also a study of the interaction of moving dislocations with experimentally observed Cr-enriched loops. We find that the fact of shifting from a loop-absorption (pure Fe) to a loop-non-absorption (Fe–Cr) regime, because of the Cr–enrichment of loops, contributes to explaining why Fe–Cr alloys harden more under irradiation than Fe. If, in addition, the existence of a large density of invisible and Cr-enriched loops is postulated, the origin of the effect becomes even more clear. Moreover, the different strength of 〈1 1 1)

AB - A review of experimental results shows that the dependence on Cr content of radiation-induced strengthening in Fe–Cr alloys and ferritic/martensitic steels is peculiar, exhibiting an increase as soon as Cr is added, followed by a local maximum and then a local minimum. This dependence is to date unexplained. In this paper we try to rationalise it, by reviewing recent (published and unpublished) molecular dynamics simulations work, devoted to the investigation of several possible mechanisms of radiation strengthening in Fe–Cr. In particular, the following questions are addressed quantitatively: (i) Does Cr influence the glide of dislocations? If so, how? (ii) Does Cr influence the interaction between dislocations and radiation-produced defects? If so, why? The latter question involves also a study of the interaction of moving dislocations with experimentally observed Cr-enriched loops. We find that the fact of shifting from a loop-absorption (pure Fe) to a loop-non-absorption (Fe–Cr) regime, because of the Cr–enrichment of loops, contributes to explaining why Fe–Cr alloys harden more under irradiation than Fe. If, in addition, the existence of a large density of invisible and Cr-enriched loops is postulated, the origin of the effect becomes even more clear. Moreover, the different strength of 〈1 1 1)

KW - Not mentioned

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_136496

UR - http://knowledgecentre.sckcen.be/so2/bibref/11739

U2 - 10.1016/j.jnucmat.2013.03.054

DO - 10.1016/j.jnucmat.2013.03.054

M3 - Article

VL - 442

SP - 470

EP - 485

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - 1-3

ER -

ID: 380267