Journal
SCRIPTA MATERIALIA
Volume 66, Issue 11, Pages 923-926Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2012.02.032
Keywords
Bulk amorphous materials; Nanoindentation; Yield phenomena; Shear transformation zone
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Funding
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2010-0025526]
- National Research Foundation of Korea [2010-0025526] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The size of the shear transformation zone (STZ) that initiates the elastic to plastic transition in a Zr-based bulk metallic glass was estimated by conducting a statistical analysis of the first pop-in event during spherical nanoindentation. A series of experiments led us to a successful description of the distribution of shear strength for the transition and its dependence on the loading rate. From the activation volume determined by statistical analysis the STZ size was estimated based on a cooperative shearing model. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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