Influence of pre-implanted helium on dislocation loop type in tungsten under self-ion irradiation

R. W. Harrison, J. A. Hinks, S. E. Donnelly

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    Abstract

    Transmission electron microscopy with in-situ ion irradiation has been used to examine dislocation loop formation during self-ion irradiation of pristine W and samples pre-implanted with He. Dislocation loops with b = ±½〈111〉 and b = 〈100〉 were observed in both the pristine W and samples pre-implanted with He. This contrasts previous works with He/H ion irradiation where no b = 〈100〉 type loops have been observed in W. The b = 〈100〉 dislocation loops form during the cascade and He has no effect on the type of dislocation loop formed; unlike b = 〈100〉 type loop nucleation in FeCr alloys.
    Original languageEnglish
    Pages (from-to)61-65
    Number of pages5
    JournalScripta Materialia
    Early online date20 Mar 2018
    DOIs
    Publication statusPublished - 1 Jun 2018

    Keywords

    • Dislocation
    • Fusion
    • In situ TEM
    • Irradiation
    • Tungsten

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