Estimation of the shear transformation zone size in a bulk metallic glass through statistical analysis of the first pop-in stresses during spherical nanoindentation

Title
Estimation of the shear transformation zone size in a bulk metallic glass through statistical analysis of the first pop-in stresses during spherical nanoindentation
Authors
최인철Zhao, Yakai유병길김용재서진유Ramamurty, Upadrasta장재일
Keywords
bulk amorphous materials; nanoindentation; yield phenomena; shear transformation zone
Issue Date
2012-06
Publisher
Scripta materialia
Citation
VOL 66, NO 11, 923-926
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/42198
ISSN
13596462
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KIST Publication > Article
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