Microstructure of two-phase Al-1.7 at% Cu alloy deformed by equal-channel angular pressing

M. Murayama, Z. Horita, K. Hono

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    357 Citations (Scopus)

    Abstract

    The microstructural changes of an aged Al-1.7 at% Cu alloy associated with severe plastic deformation have been studied by transmission electron microscopy (TEM) and energy-filtered transmission electron microscopy (EF-TEM). θ′ precipitates are almost completely dissolved after eight passes of equal-channel angular (ECA) pressing, and nearly single-phase α with a fine grain size of approximately 500 nm is obtained. When a severely deformed sample is aged for 24 h at 100 °C, precipitation of equiaxed θ phase is observed along the grain boundaries, whereas only Guinier-Preston (GP) zones are formed in the undeformed sample. The dissolution and precipitation processes in severely deformed Al-1.7 at% Cu alloy have been examined by TEM and energy-filter mapping.

    Original languageEnglish
    Pages (from-to)21-29
    Number of pages9
    JournalActa Materialia
    Volume49
    Issue number1
    DOIs
    Publication statusPublished - Jan 8 2001

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Ceramics and Composites
    • Polymers and Plastics
    • Metals and Alloys

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