Journal
INTERMETALLICS
Volume 18, Issue 3, Pages 385-393Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2009.08.011
Keywords
Glasses; metallic; Mechanical properties; Mechanical testing; Mechanical properties; theory
Categories
Funding
- General Research Fund (GRF), the Hong Kong government [PolyU 5335/08E]
- GRF [PolyU 5203/08E]
- National Science Foundation International Materials Institutes (IMI) [DMR-0231320]
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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. (C) 2009 Elsevier Ltd. All rights reserved.
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