Loading-rate-independent delay of catastrophic avalanches in a bulk metallic glass
- The Hong Kong Polytechnic Univ., Kowloon (Hong Kong)
- Shanghai Univ., Shanghai (China)
- The Hong Kong Polytechnic Univ., Kowloon (Hong Kong); Liaoning Univ. of Technology, Jinzhou (China)
- Zhengzhou Univ., Zhengzhou (China)
- Univ. of Illinois, Urbana-Champaign, IL (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
The plastic flow of bulk metallic glasses (BMGs) is characterized by intermittent bursts of avalanches, and this trend results in disastrous failures of BMGs. In the present work, a double-side-notched BMG specimen is designed, which exhibits chaotic plastic flows consisting of several catastrophic avalanches under the applied loading. The disastrous shear avalanches have, then, been delayed by forming a stable plastic-flow stage in the specimens with tailored distances between the bottoms of the notches, where the distribution of a complex stress field is acquired. Differing from the conventional compressive testing results, such a delaying process is independent of loading rate. The statistical analysis shows that in the specimens with delayed catastrophic failures, the plastic flow can evolve to a critical dynamics, making the catastrophic failure more predictable than the ones with chaotic plastic flows. Lastly, the findings are of significance in understanding the plastic-flow mechanisms in BMGs and controlling the avalanches in relating solids.
- Research Organization:
- Univ. of Tennessee, Knoxville, TN (United States)
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE); USDOE National Energy Technology Laboratory (NETL)
- Contributing Organization:
- The Hong Kong Polytechnic University, Hong Kong; Shangahi University, China; Liaoning University, China; Zhengzhou University, China; University of Illinois, Urbana-Champaign, IL (USA)
- Grant/Contract Number:
- FE0008855
- OSTI ID:
- 1252965
- Journal Information:
- Scientific Reports, Vol. 6; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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