Quasi-work-hardening at sites of shear band interactions in a Cu50Zr50 metallic glass

被引：3

作者：

Wang, D. P. ^{[1
,2
]}

Wang, A. D. ^{[2
]}

Hu, Y. C. ^{[3
]}

Sun, B. A. ^{[4
]}

Liu, C. T. ^{[2
]}

机构：

[1] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212003, Jiangsu, Peoples R China

[2] City Univ Hong Kong, Ctr Adv Struct Mat, Dept Mech & Biomech Engn, Hong Kong, Peoples R China

[3] Yale Univ, Dept Mech Engn & Mat Sci, New Haven, CT USA

[4] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

来源：

MATERIALS LETTERS | 2020年 / 281卷

基金：

中国国家自然科学基金;

关键词：

Amorphous materials; Shear band; Interaction; Elastic properties; Work-hardening; ELASTIC PROPERTIES; YOUNGS MODULUS; THICKNESS;

D O I：

10.1016/j.matlet.2020.128655

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using a powerful method of contact-resonance atomic force microscope, we studied the elastic modulus at shear band (SB) interactions in a Cu50Zr50 metallic glass (MG). A quasi-work-hardening effect is observed: the interaction site is harder than the SB itself, but softer than the undeformed matrix. Therefore, the interaction site is not the weakest position during the deformation process of MGs. Large-scale molecular dynamics simulation suggests that this quasi-work-hardening effect is correlated to a locally configurational evolution of shear-resistant cluster. Our findings are useful for understanding the deformation mechanism of multi-SBs in MGs. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：4

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