Effect of a minor element with a large mixing enthalpy difference on the plasticity of amorphous alloys

Kyou Hyun Kim, Hwi Jun Kim, Jae Chul Lee

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)

    Abstract

    In this study, we investigated the role of a minor alloying element in improving the plasticity of amorphous alloys. The plasticity of the amorphous alloys, Cu60-xZr30Ti10 Bex, was drastically improved with increasing amount of Be and reached a maximum of 23% at Cu53Zr30 Ti10Be7. It was observed that an atomistic-scale phase separation existed within the alloy, which resulted from the large difference in mixing enthalpy between the binary pairs (Be-Cu, Be-Zr). This atomistic-scale phase separation resulted in an open structure in which atomic rearrangements in the form of the creation of free volume and crystallization were facilitated during deformation. Here we discuss the origin of the enhanced plasticity by clarifying the effect of an additional element, whose mixing enthalpies with the major elements are significantly different, on the structural change of the amorphous alloy.

    Original languageEnglish
    Pages (from-to)2558-2564
    Number of pages7
    JournalJournal of Materials Research
    Volume22
    Issue number9
    DOIs
    Publication statusPublished - 2007 Sept

    ASJC Scopus subject areas

    • General Materials Science
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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