Compressive behaviour of nanocrystalline Mg-5Al alloys

H. Diao, C. Yan, J. M. Bell, L. Lu, G. P. Zhang, S. Kabra, K. D. Liss, M. W. Chen

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)

    Abstract

    Magnesium alloys are attracting increasing research interests due to their low density, high specific strength, good machinability and availability as compared to other structural materials. However, the deformation and failure mechanisms of nanocrystalline (nc) Mg alloys have not been well understood. In this work, the deformation behaviour of nc Mg-5Al alloys was investigated using compression test, with focus on the effects of grain size. The average grain size of the Mg- Al alloy was changed from 13 to 50 nm via mechanical milling. The results showed that grain size had a significant influence on the yield stress and ductility of the Mg alloys, and the materials exhibited increased strain rate sensitivity with a decrease in grain size. The deformation mechanisms were also strongly dependent on the grain sizes.

    Original languageEnglish
    Pages (from-to)85-87
    Number of pages3
    JournalMaterials Technology
    Volume27
    Issue number1
    DOIs
    Publication statusPublished - 2012 Feb

    Keywords

    • Deformation mechanism
    • Nanocrystalline Mg alloy
    • Strain hardening
    • Strain rate sensitivity
    • Texture

    ASJC Scopus subject areas

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

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