International Database on Reactor Pressure Vessel Materials for Long-Term Operation of NPPs

Kryukov, A.; Ballesteros, A.; Christiane, Bruynooghe; Estorff, U. von

doi:10.13182/nt12-a15355

Cited by 6 publications

(1 citation statement)

References 4 publications

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“…Odette et al predicted the formation of Mn-Ni phases even in the absence of copper, but at low nucleation rates [44]. The experimental observation confirmed that MNPs were not detected until neutron fluence exceeded 2×10 19 n cm −2 (E>1 MeV) in low copper RPV steel [45].…”

Section: The Formation Mechanism Of B2 Mnni Phasesmentioning

confidence: 79%

The characterization of a nanoscale MnNi cluster in thermally aged reactor pressure vessel steels

Liu¹,

Li²

2022

Mater. Res. Express

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The MnNi-rich clusters or precipitates (MNPs) are one of the most important nanofeatures resulting in irradiation-induced embrittlement of reactor pressure vessel (RPV) steels. In this study, the microstructure and mechanical properties of the thermally-aged RPV steel were investigated by microhardness and tensile test, x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atom probe tomography (APT), revealing the presence of a novel nanoscale B2 MnNi phase. The formation of these B2 MnNi phases was dominated by the thermodynamic of the RPV-steel system, and high-density dislocations could boost their formation and growth. Meanwhile, for samples aged for 2 h at 723 K, these ordered phases result in a yield-strengthening increment of 190 MPa. Although aged-induced ordered phases have a clear difference in terms of the lattice structure, nucleation rate, and thermal stability compared to irradiation-induced MNPs, the discovery of these B2 ordered phases helps us to establish a more comprehensive understanding of the nature and formation mechanism of MNPs produced by neutron irradiation.

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Section: The Formation Mechanism Of B2 Mnni Phasesmentioning

confidence: 79%

The characterization of a nanoscale MnNi cluster in thermally aged reactor pressure vessel steels

Liu¹,

Li²

2022

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

The Microstructural Characterization of NiSi-Rich Sub-precipitates Within Cementite in Isothermally Aged Reactor Pressure Vessel Steel

Liu

et al. 2019

Metall Mater Trans A

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The effect of dislocations on MnNi-rich clusters in self-ion irradiated FeMnNi alloy

Liu

et al. 2019

Journal of Nuclear Materials

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International Database on Reactor Pressure Vessel Materials for Long-Term Operation of NPPs

Cited by 6 publications

References 4 publications

The characterization of a nanoscale MnNi cluster in thermally aged reactor pressure vessel steels

The characterization of a nanoscale MnNi cluster in thermally aged reactor pressure vessel steels

The Microstructural Characterization of NiSi-Rich Sub-precipitates Within Cementite in Isothermally Aged Reactor Pressure Vessel Steel

The effect of dislocations on MnNi-rich clusters in self-ion irradiated FeMnNi alloy

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