Extraction of bulk metallic-glass yield strengths using tapered micropillars in micro-compression experiments

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)385-393
Journal / PublicationIntermetallics
Volume18
Issue number3
Publication statusPublished - Mar 2010
Externally publishedYes

Abstract

In this paper, a formula is derived based on the Mohr-Coulomb law to extract the bulk metallic-glass (BMG) yield strengths in the micro-compression experiments, accounting for the effects of a variety of geometrical parameters arising from the tapered micropillar geometries. The experimental results on three classes of BMGs, comprising the Zr-, Mg- and Fe-based BMGs, show that the yield strengths of the BMG micropillars exhibit a very weak size effect as compared with the literature data obtained from the micro-crystals. The validity of the derived formula is then checked through the comparison with the measurements from the nanoindentation and macro-compression experiments. © 2009 Elsevier Ltd. All rights reserved.

Research Area(s)

  • B. Glasses, metallic, B. Mechanical properties, E. Mechanical properties, theory, F. Mechanical testing