Developing superplasticity in a spray-cast aluminum 7034 alloy through equal-channel angular pressing

Cheng Xu, William Dixon, Minoru Furukawa, Zenji Horita, Terence G. Langdon

    Research output: Contribution to journalArticlepeer-review

    41 Citations (Scopus)

    Abstract

    A commercial Al-7034 alloy, produced by spray-casting and with an initial grain size of ∼ 2.1 μm, was subjected to equal-channel angular pressing (ECAP) at 473 K to a total of six passes, equivalent to an imposed strain of ∼ 6. In the as-pressed condition, there was a reasonably homogeneous microstructure of equiaxed grains with an average grain size of ∼ 0.3 μm. This alloy contains MgZn2 and Al3Zr precipitates, and these precipitates serve to inhibit grain growth so that an ultrafine submicrometer grain size was retained at temperatures up to and above 600 K. Tensile testing at 623 K revealed the occurrence of superplastic elongations in the as-pressed material with a maximum elongation of > 500% when using an initial strain rate of 1 × 10-2 s-1.

    Original languageEnglish
    Pages (from-to)3588-3592
    Number of pages5
    JournalMaterials Letters
    Volume57
    Issue number22-23
    DOIs
    Publication statusPublished - Jul 2003

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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