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

被引：98

作者：

Choi, In-Chul ^{[1
]}

Zhao, Yakai ^{[1
]}

Yoo, Byung-Gil ^{[1
]}

Kim, Yong-Jae ^{[1
]}

Suh, Jin-Yoo ^{[2
]}

Ramamurty, Upadrasta ^{[3
]}

Jang, Jae-il ^{[1
]}

机构：

[1] Hanyang Univ, Div Mat Sci & Engn, Seoul 133791, South Korea

[2] Korea Inst Sci & Technol, High Temp Energy Mat Ctr, Seoul 136791, South Korea

[3] Indian Inst Sci, Dept Mat Engn, Bangalore 560012, Karnataka, India

来源：

SCRIPTA MATERIALIA | 2012年 / 66卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

Bulk amorphous materials; Nanoindentation; Yield phenomena; Shear transformation zone; DEFORMATION-BEHAVIOR; NUCLEATION; LOAD;

D O I：

10.1016/j.scriptamat.2012.02.032

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页码：923 / 926

页数：4

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