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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Bibliographic Details
Published in:Journal of iron and steel research, international international, 2017-04, Vol.24 (4), p.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: Article
Language:English
Subjects:
chaotic behavior
critical behavior
high-entropy alloys
MATERIALS SCIENCE
nanoindentation
Online Access:Get full text
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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.
ISSN:1006-706X
2210-3988
DOI:10.1016/S1006-706X(17)30058-4