Journal
JOURNAL OF MATERIALS RESEARCH
Volume 30, Issue 11, Pages 1820-1826Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1557/jmr.2015.130
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Funding
- Fudan University
- Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, China
- University of Manitoba, Canada
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While conventional metallic glass (MG) is usually an alloy that contains at least two types of different elements, monatomic metallic glass (MMG) in body-centered cubic metals has recently been vitrified experimentally through ultrafast quenching. In this research, MMG in Ta was vitrified by molecular dynamics simulations and used as a model system to explore the atomistic mechanism of hardening in MG under cyclic loading well below the yield point. It was found that significant structural ordering was caused during the elastic cycling without accumulating apparent plastic strain, which ultimately led to the crystallization of MG that has been long conjectured but rarely directly proved before. It was also revealed that tensile stresses were more likely to induce structural ordering and crystallization in MG than compressive stresses.
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