Microstructural evolution in a spray-cast aluminum alloy during equal-channel angular pressing

Nong Gao, Marco J. Starink, Minoru Furukawa, Zenji Horita, Cheng Xu, Terence G. Langdon

    Research output: Contribution to journalArticlepeer-review

    27 Citations (Scopus)


    A spray-cast Al-7034 alloy was processed by equal-channel angular pressing (ECAP) to a total of eight passes at 473 K and the pressed samples were examined using transmission electron microscopy, differential scanning calorimetry and electron back-scatter diffraction. It is shown that the grain size of the alloy is reduced to ∼0.3 μm by ECAP and the high pressures associated with ECAP lead to a fragmentation of the rod-like η-phase. The high temperature of ECAP also produces a precipitation of η-phase. There is an increase in the fraction of high-angle boundaries during the initial passes of ECAP but the fraction of low-angle boundaries remains high even after eight passes.

    Original languageEnglish
    Pages (from-to)303-307
    Number of pages5
    JournalMaterials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
    Publication statusPublished - Nov 25 2005

    All Science Journal Classification (ASJC) codes

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


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