Fabrication of high-strength and high-ductility laminated A2024 aluminum alloy/aluminum composite by severe plastic deformation under high pressure

Takahiro Masuda, Zenji Horita

    Research output: Contribution to journalArticlepeer-review

    Abstract

    In this study, the method of high-pressure torsion (HPT) was applied for grain refinement of A2024/Al composites. Diffusion bonding was carried out at 773 K for 5 h to form the composite in advance. Disk samples with 10 mm diameter and 1 mm thickness were processed by HPT under a pressure of 6 GPa. The chemical composition of the diffusion treated Al layer was determined to Al-2.5%Cu-1.3%Mg by EDS analysis. Microstructural observations revealed that the grain size was refined to -180 nm in the thickness center and -440 nm in the surface side. Tensile tests showed that the ultimate tensile strength reached 710 MPa with a total elongation of 9%. Extra strengthening was attained by aging at 423 K after HPT processing, leading to an ultimate tensile strength of 760 MPa at the peak-aged condition.

    Original languageEnglish
    Pages (from-to)179-185
    Number of pages7
    JournalKeikinzoku/Journal of Japan Institute of Light Metals
    Volume67
    Issue number5
    DOIs
    Publication statusPublished - 2017

    All Science Journal Classification (ASJC) codes

    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys
    • Materials Chemistry

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