Thermally activated deformation of nanocrystalline and coarse grained CoCrFeNiMn high entropy alloy in the temperature range 4.2-350 K

Author(s)
A. V. Podolskiy, E. Schafler, E. D. Tabachnikova, M. A. Tikhonovsky, M. J. Zehetbauer
Abstract

Mechanical properties of a nanocrystalline (similar to 60 nm) and a coarse grained (grain sizes similar to 4 mu m) CoCrFeNiMn high entropy alloys were studied in uniaxial compression in the temperature range 4.2-350 K. Temperature dependences of yield strength, flow stress and strain rate sensitivity have been registered and analyzed in the framework of two thermal activation deformation models, that of thermal activation of local barrier overcoming, and that of Peierls valley double kink formation. Microscopic parameters of dislocation interaction with the barriers for thermally activated motion are estimated and low temperature deformation mechanisms are discussed. Published by AIP Publishing.

Organisation(s)
Physics of Nanostructured Materials
External organisation(s)
National Academy of Sciences of Ukraine (NASU), National Science Center Kharkiv Institute of Physics and Technology (KIPT)
Journal
Low Temperature Physics
Volume
44
Pages
976-982
No. of pages
7
ISSN
1063-777X
DOI
https://doi.org/10.1063/1.5052688
Publication date
09-2018
Peer reviewed
Yes
Austrian Fields of Science 2012
Materials physics
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/thermally-activated-deformation-of-nanocrystalline-and-coarse-grained-cocrfenimn-high-entropy-alloy-in-the-temperature-range-42350-k(5a64ac8f-88b6-4f7e-86af-6dbad78d7443).html