Plasticity performance of Al_（0.5）CoCrCuFeNi high-entropy alloys under nanoindentation

The statistical and dynamic behaviors of the displacement-load curves of a high-entropy alloy,Al_（0.5）CoCrCuFeNi,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 attribut...

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Published inJournal of iron and steel research, international Vol. 24; no. 4; pp. 390 - 396
Main Authors Yu, Li-ping, Chen, Shu-ying, Ren, Jing-li, Ren, Yang, Yang, Fu-qian, Dahmen, Karin A., Liaw, Peter K.
Format Journal Article
LanguageEnglish
Published United States 01.04.2017
Subjects
chaotic behavior
critical behavior
high-entropy alloys
MATERIALS SCIENCE
nanoindentation
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Summary:The statistical and dynamic behaviors of the displacement-load curves of a high-entropy alloy,Al_（0.5）CoCrCuFeNi,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.
Bibliography:11-3678/TF
High-entropy alloys Nanoindentation Critical behavior Chaotic behavior
The statistical and dynamic behaviors of the displacement-load curves of a high-entropy alloy,Al_（0.5）CoCrCuFeNi,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.
AC02-06CH11357
USDOE Office of Fossil Energy (FE)
USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division
National Energy Technology Laboratory (NETL)
National Natural Science Foundation of China (NNSFC)
ISSN:1006-706X
2210-3988
DOI:10.1016/S1006-706X(17)30058-4