Influence of loading rate on the mechanical performance of metallic glass

Mária Huráková*, Kornel Csach, Alena Juríková, Jozef Miškuf, Štefan Demčák, Václav Ocelík, Jeff Th M. De Hosson

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

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    Abstract

    Amorphous metallic glass Cu47Ti35Zr11Ni6Si1 was investigated by load-control nanoindentation experiments using the cube corner indenter tip over a wide range of loading rates. The indentation hardness was calculated using different methods either from the loading curves or indent area. Pop-in events were observed on the loading part of the indentation curves mainly at lower rates of loading. Instantaneous plastic deformation decreases with increasing loading rate according to a power law. At high loading rate the instantaneous deformation is suppressed by continuous plastic deformation and no well-developed pop-ins are observed. The morphology of shear bands in the pile-up area of indents showed no correlation with the pop-in event population of the nanoindentation curves and the loading rate.

    Original languageEnglish
    Pages (from-to)160-167
    Number of pages8
    JournalJournal of Non-Crystalline Solids
    Volume470
    DOIs
    Publication statusPublished - 15-Aug-2017

    Keywords

    • Cube corner indenter
    • Hardness
    • Loading rate
    • Metallic glass
    • Nanoindentation
    • Pop-ins

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