Role of Mg in simultaneously improving the strength and ductility of Al-Mg alloys

Byeong Hyeon Lee, Sung Hoon Kim, Jun Hyoung Park, Hyung Wook Kim, Jae Chul Lee

    Research output: Contribution to journalArticlepeer-review

    152 Citations (Scopus)

    Abstract

    We found that when Mg is added to Al in small amounts, it results in alloys that exhibit both significantly higher strength and ductility than those of the pure Al counterpart. Strength and plasticity are contrasting properties for most crystalline alloys; as such, the simultaneous improvement of these properties seems contradictory from the viewpoint of dislocation motion. Comparative studies of Al- xMg alloys containing different amounts of Mg were performed to elucidate how these apparently mutually exclusive properties were improved simultaneously; microstructural observations were made using X-ray diffractometry and transmission electron microscopy to assess the effect of Mg on the strength and ductility on the alloys, while molecular dynamics simulations were performed to comprehensively understand how the resulting high-strength alloys could also exhibit high ductility.

    Original languageEnglish
    Pages (from-to)115-122
    Number of pages8
    JournalMaterials Science and Engineering: A
    Volume657
    DOIs
    Publication statusPublished - 2016 Mar 7

    Bibliographical note

    Publisher Copyright:
    © 2016 Published by Elsevier B.V.

    Keywords

    • Al-Mg alloys
    • Dislocation structures
    • Mechanical characterization
    • Stacking fault energy
    • X-ray diffraction

    ASJC Scopus subject areas

    • General Materials Science
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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