Journal
SCRIPTA MATERIALIA
Volume 187, Issue -, Pages 13-18Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2020.05.059
Keywords
Bulk metallic glass; Plasticity; Cryogenic thermal cycling; Heterostructures
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Funding
- National Natural Science Foundation of China [51631003, 51871054]
- Fundamental Research Funds for the Central Universities [2242019k1G005, 2242019K40183]
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The mechanical properties and atomic-scale structure of the [(Fe0.5Co0.5)(0.75)B0.2Si0.05](96)Nb-4 bulk metallic glass (BMG) treated with cryogenic thermal cycling were studied. The obtained Fe-based BMG shows an improvement of plastic strain from 1.4 to 6.1% and maintains a high yield strength over 40 00 MPa. The high structural disorder degree caused by rejuvenation, as well as the fine-tuned crystal-like ordering structures induced by internal stress, contribute to the formation of multiple shear bands, and thus results in the enhancement of plasticity. This work provides a new insight to develop plastic Fe-based BMGs through modulating atomic-scale structure. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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