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Entropy 2019, 21(1), 54; https://doi.org/10.3390/e21010054

Deformation Behavior of Bulk Metallic Glasses and High Entropy Alloys under Complex Stress Fields: A Review

1
School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China
2
National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei 230009, China
3
Laboratory for Microstructures, Shanghai University, Shanghai 200444, China
4
School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
*
Authors to whom correspondence should be addressed.
Received: 1 December 2018 / Revised: 5 January 2019 / Accepted: 9 January 2019 / Published: 11 January 2019
(This article belongs to the Special Issue New Advances in High-Entropy Alloys)
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Abstract

The plastic deformation of bulk metallic glasses (BMGs) depends significantly on applied stress states, and more importantly, in practical applications of BMGs as structural materials, they always deform under complex stress fields. The understanding of deformation behavior of BMGs under complex stress fields is important not only for uncovering the plastic deformation mechanisms of BMGs, but also for developing BMG components with excellent mechanical performance. In this article, we briefly summarize the recent research progress on the deformation behavior of BMGs under complex stress fields, including the formation and propagation of shear bands, tunable macroscopic plasticity, and serrated plastic flows. The effect of complex stress fields on the plastic deformation mechanisms of BMGs is discussed from simple stress gradient to tailored complex stress fields. The deformation behavior of high entropy alloys (HEAs) under complex stress states has also been discussed. Challenges, potential implications and some unresolved issues are proposed. View Full-Text
Keywords: bulk metallic glass; complex stress field; shear band; flow serration; deformation mechanism; high entropy alloy bulk metallic glass; complex stress field; shear band; flow serration; deformation mechanism; high entropy alloy
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Chen, S.; Wang, J.; Xia, L.; Wu, Y. Deformation Behavior of Bulk Metallic Glasses and High Entropy Alloys under Complex Stress Fields: A Review. Entropy 2019, 21, 54.

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