Positron annihilation study of neutron irradiated pure Fe and Fe-Cu binary alloys

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Positron annihilation study of neutron irradiated pure Fe and Fe-Cu binary alloys. / Lambrecht, Marlies; Jardin, Maarten; Al Mazouzi, Abderrahim; Malerba, Lorenzo (Peer reviewer).

In: Physica Status Solidi (C), Vol. 4, No. 10, 09.08.2007, p. 3477-3480.

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@article{42831043ab52497c8ae4299b5fccf617,
title = "Positron annihilation study of neutron irradiated pure Fe and Fe-Cu binary alloys",
abstract = "The hardening and embrittlement of RPV steels is of great concern in the actual nuclear power plant life assessment. This embrittlement is caused by irradiation-induced damage. Fe-Cu binary alloys are often used to mimic the behaviour of such steels. Their study allows identifying some of the defects responsible of the hardening, especially when compared to pure iron or C-micro-alloyed iron. Owing to their self-seeking and selective trapping, positrons are used to determine the nature of these defects. Recently, at SCK•CEN, a new PAS setup has been built, calibrated and optimized to measure the CDB and LT of neutron irradiated materials. This set-up has been used to measure n-irradiated Fe and Fe-Cu alloys. It is found that the clustering of Cu take place at the very early stages of irradiation using the CDB while LT measurement are showing much more vacancy clustering for low Cu alloys than in the higher ones. Increasing the neutron dose up to 1.3 1020 n/m2, allows the follow up of the kinetic of Cu and V-clustering especially in Fe-Cu alloys. It is found that both copper and carbon decrease the size of vacancy-cluster, when added to iron.",
keywords = "positron annihilation spectroscopy, neutron irradiation, model alloys",
author = "Marlies Lambrecht and Maarten Jardin and {Al Mazouzi}, Abderrahim and Lorenzo Malerba",
note = "Score = 10",
year = "2007",
month = "8",
day = "9",
doi = "10.1002/pssc.200675798",
language = "English",
volume = "4",
pages = "3477--3480",
journal = "Physica Status Solidi (C)",
issn = "1862-6351",
publisher = "Wiley - John Wiley & Sons, Ltd",
number = "10",

}

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TY - JOUR

T1 - Positron annihilation study of neutron irradiated pure Fe and Fe-Cu binary alloys

AU - Lambrecht, Marlies

AU - Jardin, Maarten

AU - Al Mazouzi, Abderrahim

A2 - Malerba, Lorenzo

N1 - Score = 10

PY - 2007/8/9

Y1 - 2007/8/9

N2 - The hardening and embrittlement of RPV steels is of great concern in the actual nuclear power plant life assessment. This embrittlement is caused by irradiation-induced damage. Fe-Cu binary alloys are often used to mimic the behaviour of such steels. Their study allows identifying some of the defects responsible of the hardening, especially when compared to pure iron or C-micro-alloyed iron. Owing to their self-seeking and selective trapping, positrons are used to determine the nature of these defects. Recently, at SCK•CEN, a new PAS setup has been built, calibrated and optimized to measure the CDB and LT of neutron irradiated materials. This set-up has been used to measure n-irradiated Fe and Fe-Cu alloys. It is found that the clustering of Cu take place at the very early stages of irradiation using the CDB while LT measurement are showing much more vacancy clustering for low Cu alloys than in the higher ones. Increasing the neutron dose up to 1.3 1020 n/m2, allows the follow up of the kinetic of Cu and V-clustering especially in Fe-Cu alloys. It is found that both copper and carbon decrease the size of vacancy-cluster, when added to iron.

AB - The hardening and embrittlement of RPV steels is of great concern in the actual nuclear power plant life assessment. This embrittlement is caused by irradiation-induced damage. Fe-Cu binary alloys are often used to mimic the behaviour of such steels. Their study allows identifying some of the defects responsible of the hardening, especially when compared to pure iron or C-micro-alloyed iron. Owing to their self-seeking and selective trapping, positrons are used to determine the nature of these defects. Recently, at SCK•CEN, a new PAS setup has been built, calibrated and optimized to measure the CDB and LT of neutron irradiated materials. This set-up has been used to measure n-irradiated Fe and Fe-Cu alloys. It is found that the clustering of Cu take place at the very early stages of irradiation using the CDB while LT measurement are showing much more vacancy clustering for low Cu alloys than in the higher ones. Increasing the neutron dose up to 1.3 1020 n/m2, allows the follow up of the kinetic of Cu and V-clustering especially in Fe-Cu alloys. It is found that both copper and carbon decrease the size of vacancy-cluster, when added to iron.

KW - positron annihilation spectroscopy

KW - neutron irradiation

KW - model alloys

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_93187

UR - http://knowledgecentre.sckcen.be/so2/bibref/5395

U2 - 10.1002/pssc.200675798

DO - 10.1002/pssc.200675798

M3 - Article

VL - 4

SP - 3477

EP - 3480

JO - Physica Status Solidi (C)

JF - Physica Status Solidi (C)

SN - 1862-6351

IS - 10

ER -

ID: 334193