In situ study of the evolution of atomic strain of bulk metallic glass and its effects on shear band formation

被引：17
作者：
Huang, Y. J. [1 ]
Khong, J. C. [1 ]
Connolley, T. [1 ]
Mi, J. [1 ]
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
来源：
SCRIPTA MATERIALIA | 2013年 / 69卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Metallic glasses; Synchrotron X-ray diffraction; Pair distribution function; Strain; Shear bands; DEFORMATION; IMAGE;
D O I：
10.1016/j.scriptamat.2013.03.016
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The tensile behavior of TiZrNiCuBe metallic glass was studied using synchrotron X-ray diffraction and scanning electron microscopy. Shear band formation was carefully controlled by the introduction of a stress gradient due to a semi-circular notch. Micro- and atomic-level strains were calculated by the Q-space method and pair distribution function analysis, respectively. The atomic-pair strains for the area near the notch increase exponentially at the final deformation stage. This can be directly linked to the shear-induced dilatation resulting from the shear band formation. (c) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：207 / 210
页数：4
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