Effect of irradiation temperature in PWR RPV materials and its inclusion in semi-mechanistic model

Debarberis, L.; Acosta, B.; Zeman, A.; Filippo, Sevini; Ballesteros, A.; Kryukov, A.; Gillemot, F.; Brumovsky, Milan

doi:10.1016/j.scriptamat.2005.05.026

Cited by 20 publications

(9 citation statements)

References 8 publications

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“…Both CRPs and matrix damage act as obstacles to dislocation movement, causing an adverse change in material properties such as an increase in ductile-to-brittle transition temperature, hardness, yield stress, and decrease in toughness and ductility (Fisher et al, 1985). Naturally, embrittlement of RPV steel is one of the main concerns for the safe operation and life time management of a nuclear power plant (Debarberis et al, 2005). Several earlier reports identified Cu precipitation as one of the main sources of radiation-induced embrittlement in RPV steels (Phythian & English, 1993; Nagai et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Revisiting Temporal Evolution of Cu-Rich Precipitates in Fe–Cu Alloy: Correlative Small Angle Neutron Scattering and Atom-Probe Tomography Studies

et al. 2019

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Binary Fe–Cu alloys are effective prototypes for investigating radiation-induced formation and growth of nanometric Cu-rich precipitates (CRPs) in nuclear reactor pressure vessels. In this report, the temporal evolution of CRPs during thermal aging of Fe–Cu binary alloys has been investigated by using complementary techniques such as atom probe tomography (APT) and small-angle neutron scattering (SANS). We report a detailed quantitative evolution of a rarely observed morphological transformation of Cu precipitates from spherical to ellipsoid with a significant change (approximately two times) in aspect ratio, an effect known to be associated with the 9R-3R structural transition of the precipitates. It is demonstrated through APT that the precipitates remain spherical up to 8 h, however, they subsequently convert to oblate ellipsoid upon further aging. SANS analysis also detected signs of this morphological transition in reciprocal space. Furthermore, SANS quantifies evolution of the precipitates and corroborates well with the APT results. Interestingly, the power-law exponent of the temporal evolution for mean size and number density agree reasonably well with the Lifshitz–Slyozov–Wagner model, in spite of the complex morphological evolution of the precipitates.

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Section: Introductionmentioning

confidence: 99%

Revisiting Temporal Evolution of Cu-Rich Precipitates in Fe–Cu Alloy: Correlative Small Angle Neutron Scattering and Atom-Probe Tomography Studies

et al. 2019

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“…In fact if a 'temperature factor' in the form of Eq. (3) is considered [19], the ratio between the parameters a for both WWER and PWR is %1.24.…”

Section: Resultsmentioning

confidence: 99%

Analysis of WWER-440 and PWR RPV welds surveillance data to compare irradiation damage evolution

Debarberis

Acosta

Zeman

et al. 2006

Journal of Nuclear Materials

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“…The data for RPV WWER-440 base and weld metal have been collected from recently published studies [18][19][20][21] of surveillance programmes.…”

Section: Methodsmentioning

confidence: 99%

Study of radiation-induced degradation of RPV steels and model alloys by positron annihilation and Mössbauer spectroscopy

Zeman

Debarberis

Kupča

et al. 2007

Journal of Nuclear Materials

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Effect of irradiation temperature in PWR RPV materials and its inclusion in semi-mechanistic model

Cited by 20 publications

References 8 publications

Revisiting Temporal Evolution of Cu-Rich Precipitates in Fe–Cu Alloy: Correlative Small Angle Neutron Scattering and Atom-Probe Tomography Studies

Revisiting Temporal Evolution of Cu-Rich Precipitates in Fe–Cu Alloy: Correlative Small Angle Neutron Scattering and Atom-Probe Tomography Studies

Analysis of WWER-440 and PWR RPV welds surveillance data to compare irradiation damage evolution

Study of radiation-induced degradation of RPV steels and model alloys by positron annihilation and Mössbauer spectroscopy

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