Superplasticity of ultrafine-grained Al-3%Mg-0.2%Sc alloy produced by equal-channel angular pressing

Takeshi Fujita, Shogo Komura, Zenji Horita, Terence G. Langdon

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    This paper describes grain refinement of an Al-3%Mg-0.2%Sc alloy using the equal-channel angular pressing (ECAP) technique at room temperature. It is shown that a grain size of 0.2 μm is obtained with this technique. The paper also presents the results of tensile tests for the fine-grained Al-3%Mg-0.2%Sc alloy over a wide range of strain rates. Elongations of more than 1000% are attained at a temperature of 673 K in a high strain rate range of more than 10-2 s-1. Transmission electron microscopy and scanning ion microscopy are employed for microstructural observations before and after tensile testing. The results are compared with those of a cold-rolled Al-3%Mg-0.2%Sc alloy. It is demonstrated that grain refinement using the ECAP technique is useful for the production of Al alloys exhibiting high strain rate superplasticity.

    Original languageEnglish
    Pages (from-to)376-380
    Number of pages5
    JournalKeikinzoku/Journal of Japan Institute of Light Metals
    Volume50
    Issue number8
    DOIs
    Publication statusPublished - Aug 2000

    All Science Journal Classification (ASJC) codes

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

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