A statistical physics consideration about the strength of small size metallic glass pillars


We have fabricated micro-/nano- pillars of a Zr-based metallic glass, Zr50Ti16.5Cu15Ni18.5, with pillar tip diameters ranging from ~750 nm to ~110 nm. These pillars were mechanically tested quantitatively in-situ in a Transmission Electron Microscope (TEM). Due to a slight tapering of ~3°, the deformation accommodated with shear bands is driven downwards from the top. However, the real time monitoring of shear bands evolution in-situ in TEM makes it possible to measure the effective load-bearing diameter, i.e., the diameter ahead of the most forefront shear band, which enables the precise measurement of yield strength of these pillars. Consequently, it turns out that the yield strength is essentially size independent and close to the bulk value. Statistical physics description of strength of small size metallic glasses is discussed, and it is concluded that Weibull Statistics is inappropriate in describing strength of metallic glasses at micro and nano length scales.

    Similar works

    Full text


    University of Groningen Digital Archive

    Provided original full text link
    oaioai:ub.rug.nl:dbi/528c...Last time updated on 12/12/2013

    This paper was published in University of Groningen Digital Archive.

    Having an issue?

    Is data on this page outdated, violates copyrights or anything else? Report the problem now and we will take corresponding actions after reviewing your request.