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

Changqiang Chen*, Yutao Pei, Jeff Th. M. De Hosson

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

2 Citations (Scopus)

Abstract

We have fabricated micro-/nano-pillars of a Zr-based metallic glass, Zr(50)Ti(16.5)Cu(15)Ni(18.5), with pillar tip diameters ranging from similar to 750 nm to similar to 110 nm. These pillars were mechanically tested quantitatively in-situ in a Transmission Electron Microscope (TEM). Due to a slight tapering of similar to 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.

Original languageEnglish
Title of host publication15TH INTERNATIONAL CONFERENCE ON THE STRENGTH OF MATERIALS (ICSMA-15)
EditorsW Skrotzki, CG Oertel, H Biermann, M Heilmaier
Place of PublicationBRISTOL
PublisherIOP PUBLISHING LTD
Number of pages4
Volume240
Edition1
DOIs
Publication statusPublished - 2010
Event15th International Conference on the Strength of Materials (ICSMA 15) - , Germany
Duration: 16-Aug-200921-Aug-2009

Publication series

NameJournal of Physics Conference Series
PublisherIOP PUBLISHING LTD
Volume240
ISSN (Print)1742-6588

Other

Other15th International Conference on the Strength of Materials (ICSMA 15)
Country/TerritoryGermany
Period16/08/200921/08/2009

Keywords

  • WEIBULL STATISTICS
  • GRAIN-BOUNDARY
  • BULK
  • NANOINDENTATION
  • COMPRESSION
  • MG

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