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    Effect of Neutron Irradiation on the Mechanical Properties of Microalloyed Steel for Reinforced Cement Concrete


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    Irradiation embrittlement of cold-twisted microalloyed bar to be used in the construction of reinforced cement concrete (RCC) structures surrounding the calandria or pressure vessels of nuclear reactors was studied at 1 × 1019 n/cm2 (E > 1 MeV). The irradiations were carried out at <423 K. The results of the room temperature tension and the instrumented impact tests are presented. The increase in the yield strength of 230 MPa and the 111 K increase in the Charpy 41-J index temperature matched well with those of vintage pressure vessel steels irradiated to the same fluence at <370 K. These trends were used to predict the irradiation embrittlement at the lower fluence of 1017 n/cm2 (E > 1 MeV) envisaged in the service life of such RCC structures.


    RCC structure, irradiation embrittlement, dynamic yield strength, Charpy impact testing, Charpy index temperature, absorbed energy, lateral expansion, cleavage fracture strength, load-temperature diagram, yield strength, ductility, ultimate tensile strength, neutron fluence, microalloyed steel

    Author Information:

    Ganguly, C
    Head, Bhabha Atomic Research Centre, Bombay,

    Anantharaman, S
    Scientific officer, Bhabha Atomic Research Centre, Bombay,

    Sivaramakrishnan, KS
    Scientific officer, Bhabha Atomic Research Centre, Bombay,

    Committee/Subcommittee: E10.08

    DOI: 10.1520/STP17947S