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 (∼ 60 nm) and a coarse grained (grain sizes ∼ 4 μm) 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.
- 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
- 103018 Materials physics
- Keywords
- ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- 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