Application of equal-channel angular pressing for producing superplastic aluminum alloys

P. B. Berbon, M. Furukawa, Zenji Horita, M. Nemoto, N. K. Tsenev, R. Z. Valiev, T. G. Langdon

    Research output: Contribution to conferencePaperpeer-review

    Abstract

    The equal-channel angular (ECA) pressing technique was used to process two different Al alloys. Different routes were performed to observe the effect of the ECA procedure parameters. Observations by transmission electron microscopy (TEM) showed that a fine-grained structure was introduced in all processed alloys when there was a sufficient amount of strain. Mechanical tests performed at low temperatures and relatively fast strain rates demonstrated that very large ductility may be achieved. This paper describes results obtained on Al-5%Zn and Al-5.5%Mg-2.2%Li-0.12%Zr alloys. The first material showed the appearance of subgrains after a small strain was introduced, followed by an evolution of the structure into an array of high angle grain boundaries. The second material showed the effect of the strain introduced in this complex alloy. In the most successful case, an elongation of more than 1180% was obtained in the Al-Mg-Li-Zr alloy.

    Original languageEnglish
    Pages173-180
    Number of pages8
    Publication statusPublished - Jan 1 1998
    EventProceedings of the 1998 TMS Annual Meeting - San Antonio, TX, USA
    Duration: Feb 15 1998Feb 19 1998

    Other

    OtherProceedings of the 1998 TMS Annual Meeting
    CitySan Antonio, TX, USA
    Period2/15/982/19/98

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Mechanics of Materials
    • Metals and Alloys

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