Formation of radiation induced precipitates in VVER RPV materials

Platonov, P. A.; Chernobaeva, A. A.

doi:10.1016/j.ijpvp.2016.11.001

Cited by 7 publications

(1 citation statement)

References 18 publications

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“…At the same time, the sizes of precipitates in BM with lower Cu content are higher. This is in agreement with the literature data [23,24].…”

Section: High-cu Materialssupporting

confidence: 94%

The Effect of Operational Factors on Phase Formation Patterns in the Light-Water Reactor Pressure Vessel Steels

Fedotova,

Kuleshova

2023

Metals

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This paper presents the results of atom probe tomography studies on radiation-induced phase formation in light-water reactor pressure vessel steels after neutron irradiation under various conditions in comparison with the literature data. The given irradiation conditions are fluence (10–100) × 1022 m−2, flux (5–2700) × 1014 m−2s−1 and irradiation temperature (50–400) °C. The composition of the studied steels varies in a wide range for the elements significantly affecting radiation and thermal resistance of steels: Ni in the range of 0.2–6.0 wt.%, Mn–0.03–1.1 wt.%, Cu–0.01–0.16 wt.%, and P–0.01–0.03 wt.%. The number density, volume fraction, size, composition, and nucleation sites of precipitates are determined. The regularities of the effect of various operational factors on the phase formation in these steels have been analyzed and revealed. The study shows that in materials with high copper content, Cu-rich precipitates are formed by a radiation-enhanced mechanism. In materials with low copper content, their formation upon irradiation at 300 °C occurs by a radiation-induced mechanism since the main nucleation sites are point defect clusters formed in cascades. At the same time, the density, volume fraction, and composition of the precipitates depend on the steel composition (Ni and Mn content). In the steel with increased Ni content up to 5 wt.% but with ultra-low Mn content ≤ 0.03 wt.%, it is possible to suppress the formation of Ni-Si-Mn precipitates under irradiation.

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“…At the same time, the sizes of precipitates in BM with lower Cu content are higher. This is in agreement with the literature data [23,24].…”

Section: High-cu Materialssupporting

confidence: 94%