Temperature Effect on Fracture of a Zr-Based Bulk Metallic Glass
| Autor: | Gang Wang, Yi Jun, Yan Dong Jia, Sheng Zhong Kou, Yu Hang Yang, Na Yang, Huang Bo |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Toughness
Materials science lcsh:Technology Article shear band Fracture toughness relaxation General Materials Science Composite material lcsh:Microscopy lcsh:QC120-168.85 Amorphous metal lcsh:QH201-278.5 lcsh:T toughness Dynamic mechanical analysis Atmospheric temperature range bulk metallic glass lcsh:TA1-2040 Fracture (geology) Relaxation (physics) lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 Shear band |
| Zdroj: | Materials Volume 13 Issue 10 Materials, Vol 13, Iss 2391, p 2391 (2020) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma13102391 |
| Popis: | Bulk metallic glass (BMGs) is highly expected for applications in engineering structures due to their superior mechanical properties. The fracture toughness of some BMGs was investigated at cryogenic and at elevated temperatures. However, the mechanism of the temperature-dependence of BMG toughness still remains elusive. Here, we characterized the fracture toughness of Zr61Ti2Cu25Al12 BMG prepared with Zr elemental pieces with low Hf content at temperatures ranging from 134 to 623 K. The relaxation spectrum of the BMG was characterized by a dynamic mechanical analysis using the same temperature range. We found that the BMG is tougher at onset temperatures of the relaxation processes than at peak temperatures. The temperature-dependent fracture toughness of the BMG is strongly dependent on its relaxation spectrum. |
| Databáze: | OpenAIRE |
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