A lattice Monte Carlo simulation of nanophase compositions and structures in irradiated pressure vessel Fe-Cu-Ni-Mn-Si steels

In recent years the development of atomistic models dealing with microstructure evolution and subsequent mechanical property change in reactor pressure vessel steels has been recognised as an important complement to experiments. In this framework, a literature study has shown the necessity of many-body interatomic potentials for multi-component alloys. In this paper we develop a ternary many-body Fe-Cu-Ni potential for this purpose. As a first validation, we used it to perform a simulated thermal annealing study of the Fe-Cu and FeCu-Ni alloys. Good qualitative agreement with experiments is found, although fully quantitative comparison proved impossible, due to limitations in the used simulation techniques. These limitations are also briefly discussed here.

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“…This is also consistent with the static calculations presented in Section 3.1, and rigid lattice MC simulations in the Refs. [17,18,21]. In Fig.…”

Section: Simulated Thermal Ageingmentioning

confidence: 98%

Ternary Fe–Cu–Ni many-body potential to model reactor pressure vessel steels: First validation by simulated thermal annealing

Bonny

Pasianot

Castin

et al. 2009

Philosophical Magazine

247

110

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“…6 Thermodynamic-kinetic models are used to track the transport and fate of irradiation defects and solutes and to predict the number, size distribution and composition of the evolving nanofeatures. 6,8,[20][21][22] While all of these tools have individual limitations, in combination they have provided considerable insight about the nanofeatures that can be divided into three broad categories:…”

Section: Irradiation Induced Nanostructuresmentioning

confidence: 99%

“…The primary consequence of RED is the formation of fine-scale CRPs. 6,8,9,[14][15][16][20][21][22] The maximum effective concentration of supersaturated copper in the iron matrix is about 0.3%. This upper limit is imposed by coarse-scale copper preprecipitation during the final stress relief treatment.…”

Section: Irradiation Induced Nanostructuresmentioning

confidence: 99%

“…The CRPs are enriched in manganese and nickel, as well as smaller amounts of phosphorus and silicon. 6,8,[20][21][22] The nickel and manganese strongly bind and amplify the effect of copper by increasing the volume of the precipitates. This explains the observation of a strong interaction between copper and nickel (and manganese) in increasing hardening and embrittlement.…”

Section: Irradiation Induced Nanostructuresmentioning

confidence: 99%

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Embrittlement of nuclear reactor pressure vessels

Odette

Lucas

2001

JOM

281

147

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Neutron irradiation embrittlement could limit the service life of some of the reactorpressure vessels in existing commercial nuclear-power plants. Improved understanding the of the underlying causes of embrittlement has provided regulators and power-plant operators better estimates of vessel-operating margins. This article presents an overview of embrittlement, emphasizing the status of mechanistic understanding and models, and their role in increasing the reliability of vessel-integrity assessments. Finally, a number of outstanding issues and significant opportunities, including a new fracture-toughness master-curve method, are briefly described.

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“…Since it is widely insoluble in the α iron matrix, the Cu is of great concern in most of the studies. It is known that for Cu supersaturation [13]. More recently, Radiguet et al suggested at contrary a kinetic process.…”

Section: Introductionmentioning

confidence: 99%

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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A lattice Monte Carlo simulation of nanophase compositions and structures in irradiated pressure vessel Fe-Cu-Ni-Mn-Si steels

Cited by 89 publications

References 12 publications

Ternary Fe–Cu–Ni many-body potential to model reactor pressure vessel steels: First validation by simulated thermal annealing

Ternary Fe–Cu–Ni many-body potential to model reactor pressure vessel steels: First validation by simulated thermal annealing

Embrittlement of nuclear reactor pressure vessels

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

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