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

Choi, In-Chul and Zhao, Yakai and Yoo, Byung-Gil and Kim, Yong-Jae and Suh, Jin-Yoo and Ramamurty, Upadrasta and Jang, Jae-il (2012) Estimation of the shear transformation zone size fin a bulk metallic glass through statistical a analysis of the first pop-in stresses during spherical nanoindentation. In: SCRIPTA MATERIALIA, 66 (11). pp. 923-926.

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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. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	SCRIPTA MATERIALIA
Publisher:	Elsevier
Keywords:	Bulk amorphous materials; Nanoindentation; Yield phenomena; Shear transformation zone
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	14 Jul 2012 03:48
Last Modified:	14 Jul 2012 03:48
URI:	http://eprints.iisc.ac.in/id/eprint/44584

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