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Open AccessArticle

Temperature Effect on Fracture of a Zr-Based Bulk Metallic Glass

1
School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China
2
Institute of Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
*
Author to whom correspondence should be addressed.
Materials 2020, 13(10), 2391; https://doi.org/10.3390/ma13102391
Received: 15 April 2020 / Revised: 15 May 2020 / Accepted: 19 May 2020 / Published: 22 May 2020
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. View Full-Text
Keywords: bulk metallic glass; toughness; relaxation; shear band bulk metallic glass; toughness; relaxation; shear band
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MDPI and ACS Style

Yang, N.; Yi, J.; Yang, Y.H.; Huang, B.; Jia, Y.D.; Kou, S.Z.; Wang, G. Temperature Effect on Fracture of a Zr-Based Bulk Metallic Glass. Materials 2020, 13, 2391.

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