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    The Behavior of Solute Segregation and Void Formation in Fe-Cr-Ni and Fe-Cr-Mn Steels During Electron Irradiation


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    The relative swelling behavior of Fe-Cr-Mn and Fe-Cr-Ni alloys during electron irradiation is shown to be different from that observed in neutron irradiations. This difference appears to be a consequence of the different diffusion behavior of nickel and manganese in response to the operation of the inverse Kirkendall effect. The vacancy gradients driving the diffusion in these experiments are generated not only by the foil surfaces and the electron-generated radial displacement gradient but also by high angle grain boundaries deliberately centered in the middle of the electron beam. This procedure allows the relative diffusional characteristics of each element to be observed by energy-dispersive X-ray (EDX) measurements across the grain boundary. The influence of helium and minor solutes on swelling was also studied in these experiments and yielded no behavior atypical of that observed in neutron irradiation studies.


    radiation-induced segregation, inverse-Kirkendall effect, void swelling, electron irradiation, Fe-Cr-Ni alloys, Fe-Cr-Mn alloys, reduced activation, dual beam irradiation, grain boundaries

    Author Information:

    Takahashi, H
    Hokkaido University, Sapporo,

    Garner, FA
    Hanford Engineering Development Laboratory, Richland, WA

    Itoh, H
    Hokkaido University, Sapporo,

    Hu, B
    Beijing University of Iron and Steel Technology, Beijing,

    Ohnuki, S
    Hokkaido University, Sapporo,

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP33823S