Origin of the plasticity in bulk amorphous alloys

Jae Chul Lee, Kyoung Won Park, Kyou Hyun Kim, Eric Fleury, Byeong Joo Lee, Masato Wakeda, Yoji Shibutani

    Research output: Contribution to journalArticlepeer-review

    110 Citations (Scopus)

    Abstract

    Unlike the dislocation-based plasticity in crystalline metals, which can be readily explained by their crystal structure and the presence of defects, the nature of the plasticity in amorphous alloys is not completely understood. Experiments have shown that the plasticity in amorphous alloys is strongly dependent on their atomic packing density. This study, based on the combination of experimental and computational techniques, examines the origin of the plasticity in amorphous alloys considering characteristics of the inherent atomic-scale structure as defined by short-range ordered (SRO) clusters. The role of various SRO atomic clusters in creating free volume during shear deformation is discussed. We report that the plasticity exhibited by amorphous alloys is very sensitive to the characteristics of the atomic packing state, which can be described by various SRO atomic structures and quantified by the effective activation energy for crystallization.

    Original languageEnglish
    Pages (from-to)3087-3097
    Number of pages11
    JournalJournal of Materials Research
    Volume22
    Issue number11
    DOIs
    Publication statusPublished - 2007 Nov

    ASJC Scopus subject areas

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

    Fingerprint

    Dive into the research topics of 'Origin of the plasticity in bulk amorphous alloys'. Together they form a unique fingerprint.

    Cite this