Abstract
High-entropy alloys with composition of AlCoCrFeNiTi x (x: molar ratio; x = 0, 0.2, 0.4) under quasi-static and dynamic compression exhibit excellent mechanical properties. A positive strain-rate sensitivity of yield strength and the strong work-hardening behavior during plastic flows dominate upon dynamic loading in the present alloy system. The constitutive relationships are extracted to model flow behaviors by employing the Johnson-Cook constitutive model. Upon dynamic loading, the ultimate strength and fracture strain of AlCoCrFeNiTi x alloys are superior to most of bulk metallic glasses and in situ metallic glass matrix composites.
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Acknowledgments
Z.H.W. would like to acknowledge the financial support from the National Natural Science Foundation of China (No. 11390362), the Top Young Academic Leaders of Shanxi, and the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi. J.W.Q. would like to acknowledge the financial support from the National Natural Science Foundation of China (Nos. 51101110 and 51371122) and the Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi (2013). H.J.Y. would like to acknowledge the financial support from the State Key Lab of Advanced Metals and Materials (No. 2013-Z03) and the Youth Science Foundation of Shanxi Province, China (No. 2014021017-3). S.G.M. would like to acknowledge the financial support from the National Science Foundation of China (No. 51501123), the Youth Natural Science Foundation of Shanxi (No. 2015021006), Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (No. 2105127), and State Key Lab of Advanced Metals and Materials (No. 2015-Z04).
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Jiao, Z.M., Ma, S.G., Chu, M.Y. et al. Superior Mechanical Properties of AlCoCrFeNiTi x High-Entropy Alloys upon Dynamic Loading. J. of Materi Eng and Perform 25, 451–456 (2016). https://doi.org/10.1007/s11665-015-1869-3
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DOI: https://doi.org/10.1007/s11665-015-1869-3