Atomic-scale homogenization in an fcc-based high-entropy alloy via severe plastic deformation

Hao Yuan, Ming Hung Tsai, Gang Sha, Fan Liu, Zenji Horita, Yuntian Zhu, Jing Tao Wang

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)

    Abstract

    The atomic-scale homogenization of a face-centered-cubic-based high-entropy alloy (HEA), Al0.3Cu0.5CoCrFeNi, using severe plastic deformation (SPD) is reported. Atom probe tomography revealed that water quenching from high temperature cannot produce a homogeneous single phase, and clustering of Cu, Al and Ni still exists. Subsequent processing by high-pressure torsion produced nanostructured non-equilibrium single phase with homogeneous elemental distribution at atomic scale. Importantly, such a non-equilibrium single phase is stable at room temperature due to the sluggish diffusion kinetics. These observations suggest that SPD is an effective approach for producing single-phase HEAs for fundamental studies and applications.

    Original languageEnglish
    Pages (from-to)15-23
    Number of pages9
    JournalJournal of Alloys and Compounds
    Volume686
    DOIs
    Publication statusPublished - Nov 25 2016

    All Science Journal Classification (ASJC) codes

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

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