STP683: Effects of Bombarding Ions on the Void Swelling Profile in Nickel

    Whitley, JB
    University of Wisconsin, Madison, Wis.

    Kulcinski, GL
    University of Wisconsin, Madison, Wis.

    Smith, HV
    University of Wisconsin, Madison, Wis.

    Wilkes, P
    University of Wisconsin, Madison, Wis.

    Pages: 18    Published: Jan 1979


    Abstract

    Specimens of high-purity nickel were irradiated with high-energy carbon and aluminum ions to study the effect on the void microstructure of using different bombarding species. The depth-dependent damage structure was determined by preparing the foils such that they could be viewed directly in cross section. These results were then compared with previous irradiations performed on identical material using self-ions. The swelling behavior observed in the end-of-range region for all specimens was similar, implying that impurities introduced by the ion beam do not strongly influence the swelling response of the material. The mass of the irradiating ions had no noticeable effect on the swelling values achieved for similar damage states, even though the recoil energy spectra produced by the various ions were different. Under aluminum ion irradiation, the void density passed through a maximum at a dose <2 displacements per atom (dpa) and then decreased continuously with increasing dose. Voids were also observed in all specimens at depths ≈15 percent beyond the predicted end-of-range effects.

    Keywords:

    nickel, irradiation, radiation effects, transmission electron microscopy, ion bombardment


    Paper ID: STP38162S

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP38162S


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