Journal
MATERIALS LETTERS
Volume 281, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2020.128655
Keywords
Amorphous materials; Shear band; Interaction; Elastic properties; Work-hardening
Funding
- General Research Fund of Hong Kong Government (at CityU) [11205515]
- National Natural Science Foundation of China [51901086]
- Natural Science Foundation of Jiangsu Province of China [BK20190977]
- University Science Research Project of Jiangsu Province [19KJB430016]
- Open Foundation of Zhenjiang Key Laboratory for high technology research on marine functional films [ZHZ2019009]
- Jiangsu University of Science and Technology [1062931809]
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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.
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