Nano-voids formation at the interaction sites of shear bands in a Zr-based metallic glass

Understanding the formation mechanism of voids is a significant issue in controlling the catastrophic fracture in the form of shear bands in metallic glasses. Here, using an amplitude-modulation atomic force microscope, we investigated the nano-voids formation at the mutual interaction of shear band...

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Published inEuropean physical journal. Applied physics Vol. 97; p. 91
Main Authors Dong, Zhenzhen, Wang, Dongpeng, Wu, Yicheng, Geng, Yaoxiang, Chen, Fugang, Guo, Pingyi, Qiao, Yaoxin, Li, Xin, Wang, Yuxin
Format Journal Article
LanguageEnglish
Published 2022
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Summary:Understanding the formation mechanism of voids is a significant issue in controlling the catastrophic fracture in the form of shear bands in metallic glasses. Here, using an amplitude-modulation atomic force microscope, we investigated the nano-voids formation at the mutual interaction of shear bands in a Cu 50 Zr 50 metallic glass. The results of phase shift revealed higher energy dissipation and more soft zones for the nano-voids. The formation of these nano-voids results from tensile stress concentration caused by the interaction of shear bands, based on the results of finite element simulation. The appearance of nano-voids and stress distribution at the site of shear band interaction is essential in understanding the plastic deformation and fracture of metallic glasses.
ISSN:1286-0042
1286-0050
DOI:10.1051/epjap/2022220284