Study on Data Multiplication of Impact Toughness by Specimen Reconstitution Technique and Master Curve

The space of irradiation surveillance capsules of nuclear power plants is limited. How to obtain the multiplicative toughness data of service materials based on these monitoring specimens is an important challenge in nuclear engineering. The reconstitution specimens could be reused to gain newer data or putted back into radiation monitoring tubes to gain highly irradiated material performance data for extended life operation of nuclear power plants. In this study, the Charpy V-notched impact test was carried out on the intact and reconstituted specimens of 30Mn2V steel by electron beam welding recombination technology, the multiplicative impact test data were obtained, and the relationship between impact energy of fracture with temperature was studied. The impact energy is converted into 1 T-CT equivalent fracture toughness, and then the reference temperature and master curve equation of 30Mn2V steel are calculated by the multi-temperature method. The consistency and dispersion of fracture toughness between reconstituted specimens and intact specimens are compared and studied. In this paper, the impact toughness data of materials are multiplied by specimens reconstitution technology, and the fracture toughness distribution in the ductile–brittle transition zone of the ferritic steel is predicted and evaluated.