Dependence of shear yield strain and shear transformation zone on the glass transition temperature in thin film metallic glasses

被引：11
作者：
Qian, X. [1 ,2 ]
Cao, Q. P. [1 ,2 ]
Liu, S. Y. [1 ,2 ]
Wang, C. [1 ,2 ]
Wang, X. D. [1 ,2 ]
Zhang, D. X. [3 ]
Ramamurty, U. [1 ,2 ,4 ,5 ]
Jiang, J. Z. [1 ,2 ]
机构：
[1] Zhejiang Univ, ICNSM, Hangzhou 310027, Zhejiang, Peoples R China
[2] Zhejiang Univ, Lab New Struct Mat, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
[3] Zhejiang Univ, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China
[4] Indian Inst Sci, Dept Mat Engn, Bangalore 560012, Karnataka, India
[5] King Abdulaziz Univ, Ctr Excellence Adv Mat Res, Jeddah 21589, Saudi Arabia
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 652卷
关键词：
Thin film metallic glasses; Magnetron sputtering; Nanoindentation; Shear yield strain; Shear transformation zone; MECHANICAL-PROPERTIES; DEFORMATION; BANDS; SIZE; FLOW;
D O I：
10.1016/j.jallcom.2015.08.217
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The dependence of shear yield strain, the activation energy and volume of shear transformation zone on the glass transition temperature was investigated through the analysis of statistical distributions of the first pop-in events during spherical indentation of four different thin film metallic glasses. Only the Cu-Zr metallic glass exhibits a bimodal distribution of the first pop-in loads, whereas W-Ru-B, Zr-Cu-Ni-Al and La-Co-Al metallic glasses show an unimodal distribution. Results show that shear yield strain and activation energy of shear transformation zone decrease whereas the volume of shear transformation zone increases with increasing homologous temperature, indicating that it is the activation energy rather than the volume of shear transformation zone that controls shear yield strain. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：191 / 199
页数：9
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