Heterogeneous irradiation-induced copper precipitation in ferritic iron–copper model alloys

Pareige, P.; Radiguet, B.; Barbu, A.

doi:10.1016/j.jnucmat.2006.02.073

Cited by 30 publications

(14 citation statements)

References 7 publications

(10 reference statements)

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“…This embrittlement is partly due to the formation of a high number density of nanometer-sized solute clusters, which impede the motion of dislocations. They are mainly enriched in Cu, Mn, Ni and Si [2][3][4][5][6][7][8][9]. To be able to predict the evolution of the mechanical properties of RPV steels, it is necessary to understand their formation mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…More recently, Radiguet et al suggested at contrary a kinetic process. Indeed, they showed by using a rate theory (RT) modelling that the hypothesis of an enhanced Cu precipitation did not permit to reproduce the characteristics (number density, size distribution) of Cu clusters formed after irradiation and experimentally identified by APT (atom probe tomography) [5]. Since the radiation-induced clustering is independent of the character over or under saturated of the solid solution, a simple way to discriminate both mechanisms is to study an under-saturated alloy.…”

Section: Introductionmentioning

confidence: 99%

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Irradiation-Induced Solute Clustering in a Low Nickel FeMnNi Ferritic Alloy

et al. 2011

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Understanding the radiation embrittlement of reactor pressure vessel (RPV) steels is required to be able to operate safely a nuclear power plant or to extend its lifetime. The mechanical properties degradation is partly due to the clustering of solute under irradiation. To gain knowledge about the clustering process, a Fe−1.1 Mn−0.7 Ni (at.%) alloy was irradiated in a test reactor at two fluxes of 0.15 and 9 × 10 17 n E>1MeV .m −2 .s −1 and at increasing doses from 0.18 to 1.3 × 10 24 n E>1MeV .m −2 at 300 • C. Atom probe tomography (APT) experiments revealed that the irradiation promotes the formation in the α iron matrix of Mn/Mn and/or Ni/Ni pair correlations at low dose and Mn-Ni enriched clusters at high dose. These clusters dissolve partially after a thermal treatment at 400 • C. Based on a comparison with thermodynamic calculations, we show that the solute clustering under irradiation can just result from an induced mechanism.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Irradiation-Induced Solute Clustering in a Low Nickel FeMnNi Ferritic Alloy

et al. 2011

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“…Its solubility at the typical ageing temperatures (i.e., $775 K or so) is known to be very low (60.1 at.% [11,14]) so that even for typical RPVs with Cu, an impurity present in a saturated solid-solution phase, can provoke significant effects [3]. Recently, employing 3D atom-probe technique, Pareige et al [15] have measured the mean size and number density of irradiation induced heterogeneous copper clusters in binary Fe-Cu (0.088 at.% Cu) specimens. However, the study is limited to the case for MeV electrons and keV ions irradiated conditions.…”

Section: Introductionmentioning

confidence: 99%

Local atomic structure in iron copper binary alloys: An extended X-ray absorption fine structure study

Kuri¹,

Degueldre²,

Bertsch³

et al. 2007

Journal of Nuclear Materials

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“…Fe self-diffusion and Cu impurity diffusion mechanisms in Fe-Cu alloys by the migration of vacancies have been investigated using positron annihilation spectroscopy (PAS). PAS has been used to study tiny Cu precipitates, vacancies and their complexes in Fe-Cu alloys [4,11,12].…”

Section: Introductionmentioning

confidence: 99%

Migration behavior of vacancies in electron irradiated Fe‐Cu alloys

Cao

Sato

et al. 2009

Phys. Status Solidi (c)

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The formation of Cu precipitates in Cu containing steels is one of the key factors leading to embrittlement in reactor pressure vessel steels. Cu precipitates are formed by the migration of vacancies in steels and the behaviour of these vacancies is therefore important. In the present study, vacancies were introduced into Fe‐Cu alloys by electron irradiation with 28 MeV at 100 K. The effects of Cu concentration and tiny Cu precipitates on the migration of vacancies and growth of precipitates in Fe‐Cu alloys were investigated by positron annihilation lifetime measurements. The effect of Cu concentration between Fe‐0.3 mass% Cu to Fe‐0.6 mass% Cu on the migration of vacancies and the formation of Cu precipitates was negligible small. The formation of Cu precipitates was found to decrease the migration temperature of vacancies. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Heterogeneous irradiation-induced copper precipitation in ferritic iron–copper model alloys

Cited by 30 publications

References 7 publications

Irradiation-Induced Solute Clustering in a Low Nickel FeMnNi Ferritic Alloy

Irradiation-Induced Solute Clustering in a Low Nickel FeMnNi Ferritic Alloy

Local atomic structure in iron copper binary alloys: An extended X-ray absorption fine structure study

Migration behavior of vacancies in electron irradiated Fe‐Cu alloys

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