@article{2c191dcd2b7a41408e01c0a3e5659cbb,
title = "Plastic dynamics of the Al0.5CoCrCuFeNi high entropy alloy at cryogenic temperatures: Jerky flow, stair-like fluctuation, scaling behavior, and non-chaotic state",
abstract = "This study investigates the plastic behavior of the Al0.5CoCrCuFeNi high-entropy alloy at cryogenic temperatures. The samples are uniaxially compressed at 4.2 K, 7.5 K, and 9 K. A jerky evolution of stress and stair-like fluctuation of strain are observed during plastic deformation. A scaling relationship is detected between the released elastic energy and strain-jump sizes. Furthermore, the dynamical evolution of serrations is characterized by the largest Lyapunov exponent. The largest Lyapunov exponents of the serrations at the three temperatures are all negative, which indicates that the dynamical regime is non-chaotic. This trend reflects an ordered slip process, and this ordered slip process exhibits a more disordered slip process, as the temperature decreases from 9 K to 4.2 K or 7.5 K.",
author = "Xiaoxiang Guo and Xie Xie and Jingli Ren and Marina Laktionova and Elena Tabachnikova and Liping Yu and Cheung, {Wing Sum} and Dahmen, {Karin A.} and Liaw, {Peter K.}",
note = "Funding Information: J. L. Ren is very grateful for the financial support from the Natural Science Foundation of China (11771407), the Plan for Scientific Innovation Talent of Henan Province (164200510011), the Innovative Research Team of Science and Technology in the Henan Province (17IRTSTHN007), the National Key Research and Development Program of China (2017YFB0702504), and the Opening fund of the State Key Laboratory of Nonlinear Mechanics (LNM201710). K. A. Dahmen and P. K. Liaw would like to acknowledge the Department of Energy (DOE), Office of Fossil Energy, National Energy Technology Laboratory (DE-FE-0008855, DE-FE-0024054, and DE-FE-0011194), with Mr. V. Cedro, Mr. R. Dunst, Dr. P. Rawls, and Dr. J. Mullen as program managers. P. K. Liaw very much appreciates the support of the U.S. Army Research Office project (W911NF-13-1-0438) with the program managers, Dr. M. P. Bakas and Dr. D. M. Stepp. P. K. Liaw thanks the support from the National Science Foundation (DMR-1611180) with the program director, Dr. D. Farkas.",
year = "2017",
month = dec,
day = "18",
doi = "10.1063/1.5004241",
language = "English (US)",
volume = "111",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "25",
}