Next Article in Journal
Assessment of Rational Design of Self-Compacting Concrete Incorporating Fly Ash and Limestone Powder in Terms of Long-Term Durability
Previous Article in Journal
Effect of Heat Treatment on Cr2Nb Phase and Properties of Spark Plasma Sintered Cu-2Cr-1Nb Alloy
Open AccessArticle

Effect of Strain Rate on Compressive Behavior of a Zr-Based Metallic Glass under a Wide Range of Strain Rates

1
School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
2
Institute of Metal Research, Shenyang National Laboratory for Materials Science, Chinese Academy of Sciences, Shenyang 110016, China
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(12), 2861; https://doi.org/10.3390/ma13122861
Received: 27 May 2020 / Revised: 10 June 2020 / Accepted: 11 June 2020 / Published: 25 June 2020
The strain rate effect on the mechanical behavior of amorphous alloys has aroused general interest. Most studies in this area have focused on quasi-static and high strain-rate compressive deformations. However, experimental results have been few, or even non-existent, under a moderate strain-rate loading. This article extends the traditional split Hopkinson pressure bar (SHPB) technique to characterize compressive deformation of an amorphous alloy at medium strain rates. The compressive behavior of Zr65.25Cu21.75Al8Ni4Nb1 amorphous alloy shows a negative strain rate effect on the yield strength with a quasi-static, moderate to high strain-rate range, and the fracture angle increases from 44° at 10−5 s−1 to 60° at 4000 s−1 as strain rate increases. Herein, we introduce a modified cooperative shear model to describe the compressive behavior of the current amorphous alloy under a broad strain rate range. The model predicts that the normalized yield strength will linearly descend with logarithmic strain rate when the strain rate is less than a critical strain rate, however, which rapidly decreases linearly with the square of the strain rate at high strain rates. The predicted data of the model are highly consistent with the current experimental results. These findings provide support for future engineering applications of amorphous alloys. View Full-Text
Keywords: amorphous alloy; strain rate; yield strength; free volume; thermal softening; SHPB amorphous alloy; strain rate; yield strength; free volume; thermal softening; SHPB
Show Figures

Figure 1

MDPI and ACS Style

Li, W.; Geng, T.; Ge, S.; Zhu, Z.; Zhang, L.; Li, Z.; Fu, H.; Zhang, H.; Li, H.; Wang, A.; Zhang, H. Effect of Strain Rate on Compressive Behavior of a Zr-Based Metallic Glass under a Wide Range of Strain Rates. Materials 2020, 13, 2861.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop