Enhancement of strength and stability of nanostructured Ni by small amounts of solutes

H.W. Zhang, K. Lu, R. Pippan, Xiaoxu Huang, Niels Hansen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Polycrystalline Ni with a purity of 99.7% (with 0.14% Ti) has been deformed by high-pressure torsion at room temperature to εvM=100. The presence of solute atoms markedly raises both the strength and the thermal stability, showing a flow stress of about 1700MPa and a recrystallization temperature of about 500°C. The effect of the solute on dislocation storage during deformation and on the mobility of dislocations and boundaries during annealing are discussed. The strengthening mechanisms and their superposition are also analyzed.
    Original languageEnglish
    JournalScripta Materialia
    Volume65
    Issue number6
    Pages (from-to)481-484
    ISSN1359-6462
    DOIs
    Publication statusPublished - 2011

    Keywords

    • Materials characterisation and modelling

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