Journal
METALS
Volume 10, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/met10081063
Keywords
bulk metallic glass; annealing; nanoindentation; hardness; strain rate
Funding
- Natural Science Foundation of Xinjiang Uygur Autonomous Region of China [2019D01C034]
- Doctoral Fund of Xinjiang University, China [BS180211]
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The influence of isothermal annealing on the strain rate sensitivity (SRS) of a Zr-based bulk metallic glass (BMG) was investigated by nanoindentation. A more positive SRS is observed with a decrease in the content of the free volume (FV) of the sample. Furthermore, the SRS becomes nearly constant with increasing annealing time when the FV is annealed out. By taking into consideration the FV-assisted activation and combination of the shear transformation zones (STZs), the underlying mechanism is well understood. The current work may offer useful insights into the correlation between the microstructure and mechanical properties of BMGs.
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