Master curve reference temperature behavior of steels with varying Ni/Mn content and subjected to a fluence of 11·1019 neutron/cm2
Year: 2024
Type: article
Abstract: The degradation of fracture toughness due to irradiation needs to be understood to assess the structural integrity of reactor pressure vessels for long-term operation. The level of degradation is dependent on the chemical content, particularly of elements like Ni and Mn. The fracture toughness properties for three types of steels (i.e. VVER-1000 steel, western model steel and VVER-1000 welds) with varying contents of Ni and Mn were characterized based on Master Curve T 0 reference temperature in reference condition and in irradiated condition. The results show that, in the high fluence region, the shifts in T 0 correlate with the content of Ni and Mn, and the scatter in fracture toughness is mostly consistent for the reference and irradiated conditions. At higher T 0 values, above 75 °C, T 41J gives an increasingly larger estimate compared to T 0 . The obtained results can be applied to develop new improved embrittlement trends curves for NPP lifetime assessment.
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,510
Award: G1405157096
OpenAlex ID: W4405757008