Abstract
High-entropy alloys (HEAs) are a novel class of alloys that have many desirable properties. The serrated flow that occurs in high-entropy alloys during mechanical deformation is an important phenomenon since it can lead to significant changes in the microstructure of the alloy. In this article, we review the recent findings on the serration behavior in a variety of high-entropy alloys. Relationships among the serrated flow behavior, composition, microstructure, and testing condition are explored. Importantly, the mechanical-testing type (compression/tension), testing temperature, applied strain rate, and serration type for certain high-entropy alloys are summarized. The literature reveals that the serrated flow can be affected by experimental conditions such as the strain rate and test temperature. Furthermore, this type of phenomenon has been successfully modeled and analyzed, using several different types of analytical methods, including the meanfield theory formalism and the complexity-analysis technique. Importantly, the results of the analyses show that the serrated flow in HEAs consists of complex dynamical behavior. It is anticipated that this review will provide some useful and clarifying information regarding the serrated-flow mechanisms in this material system. Finally, suggestions for future research directions in this field are proposed, such as the effects of irradiation, additives (such as C and Al), the presence of nanoparticles, and twinning on the serrated flow behavior in HEAs.
Original language | English |
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Article number | 1101 |
Pages (from-to) | 1-72 |
Number of pages | 72 |
Journal | Metals |
Volume | 10 |
Issue number | 8 |
DOIs | |
State | Published - Aug 2020 |
Externally published | Yes |
Funding
S.Y.C., C.L., R.F., X.X., and P.K.L. very much appreciate the supports of (1) the US National Science Foundation (DMR1611180 and 1809640) and (2) the US Army Research Office (W911NF-13-1-0438 and W911NF19-2-0049), with J. Yang, G. Shiflet, D. Farkas, M. P. Bakas, D. M. Stepp, and S. Mathaudhu as program managers. Funding: S.Y.C., C.L., R.F., X.X., and P.K.L. very much appreciate the supports of (1) the US National Science Foundation (DMR1611180 and 1809640) and (2) the US Army Research Office (W911NF-13-1-0438 and W911NF-19-2-0049), with J. Yang, G. Shiflet, D. Farkas, M. P. Bakas, D. M. Stepp, and S. Mathaudhu as program managers.
Funders | Funder number |
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US Army Research Office | |
US National Science Foundation | |
National Science Foundation | DMR1611180, 1809640 |
Army Research Office | W911NF-19-2-0049, W911NF-13-1-0438 |
Keywords
- Data analysis
- High-entropy alloys
- Microstructure
- Serrated flow