Plasticity performance of Al0.5CoCrCuFeNi high-entropy alloys under nanoindentation
Li-ping Yu1,Shu-ying Chen2,Jing-li Ren1,3,*,Yang Ren4,Fu-qian Yang5,Karin A. Dahmen6, Peter K. Liaw2,
1 School of Mathematics and Statistics, Zhengzhou University, Zhengzhou 450001, Henan, China
2 Department of Materials Science and Engineering, The University of Tennessee, Tennessee 37996, USA 3 State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, CAS, Beijing 100190, China 4 X-ray Science Division, Argonne National Laboratory, Illinois 60439, USA 5 Department of Chemical and Materials Engineering, University of Kentucky, Kentucky 40506, USA 6 Department of Physics, University of Illinois at Urbana-Champaign, Illinois 61801, USA
Plasticity performance of Al0.5CoCrCuFeNi high-entropy alloys under nanoindentation
Li-ping Yu1,Shu-ying Chen2,Jing-li Ren1,3,*,Yang Ren4,Fu-qian Yang5,Karin A. Dahmen6, Peter K. Liaw2,
1 School of Mathematics and Statistics, Zhengzhou University, Zhengzhou 450001, Henan, China
2 Department of Materials Science and Engineering, The University of Tennessee, Tennessee 37996, USA 3 State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, CAS, Beijing 100190, China 4 X-ray Science Division, Argonne National Laboratory, Illinois 60439, USA 5 Department of Chemical and Materials Engineering, University of Kentucky, Kentucky 40506, USA 6 Department of Physics, University of Illinois at Urbana-Champaign, Illinois 61801, USA
ժҪ The statistical and dynamic behaviors of the displacement-load curves of a high-entropy alloy, Al0.5CoCrCuFeNi, were analyzed for the nanoindentation performed at two temperatures. Critical behavior of serrations at room temperature and chaotic flows at 200��C were detected. These results are attributed to the interaction among a large number of slip bands. For the nanoindentation at room temperature, recurrent partial events between slip bands introduce a hierarchy of length scales, leading to a critical state. For the nanoindentation at 200��C, there is no spatial interference between two slip bands, which is corresponding to the evolution of separated trajectory of chaotic behavior.
Abstract��The statistical and dynamic behaviors of the displacement-load curves of a high-entropy alloy, Al0.5CoCrCuFeNi, were analyzed for the nanoindentation performed at two temperatures. Critical behavior of serrations at room temperature and chaotic flows at 200��C were detected. These results are attributed to the interaction among a large number of slip bands. For the nanoindentation at room temperature, recurrent partial events between slip bands introduce a hierarchy of length scales, leading to a critical state. For the nanoindentation at 200��C, there is no spatial interference between two slip bands, which is corresponding to the evolution of separated trajectory of chaotic behavior.
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Li-ping Yu,Shu-ying Chen,Jing-li Ren,,*,Yang Ren,Fu-qian Yang5,Karin A. Dahmen6, Peter K. Liaw,. Plasticity performance of Al0.5CoCrCuFeNi high-entropy alloys under nanoindentation[J]. �й������ڿ���, 2017, 24(4): 390-396.
Li-ping Yu,Shu-ying Chen,Jing-li Ren,,*,Yang Ren,Fu-qian Yang5,Karin A. Dahmen6, Peter K. Liaw,. Plasticity performance of Al0.5CoCrCuFeNi high-entropy alloys under nanoindentation. Chinese Journal of Iron and Steel, 2017, 24(4): 390-396.
2017, Vol. 24 
