STP484

    Influence of Neutron Irradiation on the Creep Rupture Properties of a 16Cr-13Ni Steel

    Published: Jan 1970


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    Abstract

    The influence of neutron irradiation (up to 1.1 x1022 n/cm2, E>0.1 MeV) on the creep rupture properties of a Cb stabilized 16Cr-13Ni steel was studied in this paper. Different heat treatments and cold work conditions and several irradiation temperatures were investigated.

    Low-temperature irradiation causes an increase in time to rupture at 650 and 750 C, whereas creep rate is reduced by more than a factor of ten. The creep ductility decreased to less than 1 percent. High-temperature irradiation does not cause a substantial change in rupture time at 650 C for the aged condition and the 50 percent cold work and 50 percent cold work+1 h 850 C conditions.

    The rupture life of specimens which were cold-worked 10 percent is strongly decreased by irradiation. Only slight changes in creep rate could be observed after high-temperature irradiation. Electron microscopy investigations indicate that the increase in rupture life and reduction in creep rate after low-temperature irradiation is due to a large number of dislocation loops. In the specimens irradiated at 650 C and above only He bubbles could be detected.

    Keywords:

    irradiation, neutron irradiation, radiation effects, bursting, creep rate, creep rupture strength, creep tests, ductility, embrittlement, dislocations, cold working, hardening (materials), heat treatment, austenitic stainless steels, precipitation hardening steels, nickel-chromium steels


    Author Information:

    Ehrlich, K
    Institut für Material- und Festkorperforschung, Kernforschungszentrum Karlsruhe,

    Böhm, H
    Institut für Material- und Festkorperforschung, Kernforschungszentrum Karlsruhe,

    Wassilew, C
    Institut für Material- und Festkorperforschung, Kernforschungszentrum Karlsruhe,


    Paper ID: STP26648S

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP26648S


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