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Size effects on plasticity in high-entropy alloys

Published online by Cambridge University Press:  20 August 2018

Indranil Basu Open the ORCID record for Indranil Basu [Opens in a new window] ,
Václav Ocelík  and
Jeff Th. M. De Hosson
Indranil Basu*
Affiliation:
Department of Applied Physics, Zernike Institute for Advanced Materials and Materials Innovation Institute, University of Groningen, Groningen 9747AG, The Netherlands
Václav Ocelík
Affiliation:
Department of Applied Physics, Zernike Institute for Advanced Materials and Materials Innovation Institute, University of Groningen, Groningen 9747AG, The Netherlands
Jeff Th. M. De Hosson
Affiliation:
Department of Applied Physics, Zernike Institute for Advanced Materials and Materials Innovation Institute, University of Groningen, Groningen 9747AG, The Netherlands
*
a)Address all correspondence to this author. e-mail: i.basu@rug.nl
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Abstract

The current review outlines the size-dependent plastic behavior of high-entropy alloys (HEAs) and the underlying deformation mechanisms. Particular focus is laid upon the influence of microstructural design on the small-scale deformation characteristics. The role of defect types as carriers of plasticity is appraised and correlated with the frequently observed mechanical behavior peculiar to the breed of HEAs. Deformation response is classified on the basis of mechanical testing techniques probing intrinsic (nanoindentation techniques) as well as extrinsic size (micro/nanopillar compression) effects. The mechanisms of incipient plasticity and serrated flow behavior in HEAs are discussed. Furthermore, the role of interfaces between crystallographically dissimilar lattices on small-scale deformation behavior in these alloys is assessed. The article provides a clear overview of the existing HEA research in this avenue as well as the critical knowledge gaps that need to be addressed.

Keywords

high-entropy alloyssize effectsinterfacesplastic deformationserrated flow
Type
Invited Review
Information
Journal of Materials Research , Volume 33 , Issue 19: Focus Issue: Fundamental Understanding and Applications of High-Entropy Alloys , 14 October 2018 , pp. 3055 - 3076
Copyright
Copyright © Materials Research Society 2018 

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Footnotes

This section of Journal of Materials Research is reserved for papers that are reviews of literature in a given area.

References

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