Aging behavior of Al-Mg-Si alloys processed by high-pressure torsion

Daichi Akama, Zenji Horita, Kenji Matsuda, Shoichi Hirosawa

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    4 Citations (Scopus)

    Abstract

    This research investigates simultaneous strengthening by grain refinement and fine precipitation in age-hardenable Al-Mg-Si alloys containing an additional element of either Ag, Cu, Pt or Pd. The alloys were solution-treated and processed by high-pressure torsion (HPT) at room temperature under a pressure of 6 GPa. They were aged at a temperature of 373 K for up to a total period of 6.7 hours. Vickers microhardness was measured after selected periods of aging and the microstructures were observed by transmission electron microscopy. It was found that, in all alloys, the grain sizes after HPT were refined to 300-400 nm and there were significant increases in the hardness through the HPT processing. The hardness was further increased by the subsequent ageing treatment, confirming the simultaneous strengthening by grain refinement and fine precipitation. However, the aging behavior was different depending on the alloying compositions.

    Original languageEnglish
    Title of host publicationNanomaterials by Severe Plastic Deformation, NanoSPD5
    PublisherTrans Tech Publications Ltd
    Pages259-264
    Number of pages6
    ISBN (Print)9783037850077
    DOIs
    Publication statusPublished - 2011

    Publication series

    NameMaterials Science Forum
    Volume667-669
    ISSN (Print)0255-5476
    ISSN (Electronic)1662-9752

    All Science Journal Classification (ASJC) codes

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

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