Precipitation of metastable δ′ in Al–1·9Li–2·5Mg alloy

H. Tsubakino, R. Nozato, T. Sakurai, Y. Hasegawa, Y. Hayashi

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)

    Abstract

    Metastable δ′ precipitates formed at 473 K in Al–1·9Li–2·5Mg alloy have been studied via specific heat measurements, analytical transmission electron microscopy, and atom probe field ion microscopy. The peak temperature of heat absorption associated with the resolution of δ′ into the matrix increases by more than 45 K after prolonged aging, i.e. the thermal stability of δ′ is enhanced by the aging treatment. The coarsening of δ′ obeys Ostwald ripening kinetics. However, the increase in the peak temperature is not related to the increase in size of δ′ but is instead attributed to an increase of the Mg content in δ′ precipitates; presumably, δ′ changes from Al3Li to (Al, Mg)3Li.

    Original languageEnglish
    Pages (from-to)222-226
    Number of pages5
    JournalMaterials Science and Technology (United Kingdom)
    Volume10
    Issue number3
    DOIs
    Publication statusPublished - 1994 Mar

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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