The WOS database has recently reported more than 1000 citation records registered for the publication by F. Otto, A. Dlouhý, Ch. Somsen, H. Bei, G. Eggeler and E.P. George: The influences of temperature and microstructure on the tensile properties of a CoCrFeMnNi high-entropy alloy, Acta Materialia, 2013, vol. 61, p. 5743-5755.
This ranks the paper among the top 1% in the academic field of Materials Science based on a highly cited threshold for the field and publication year. The unique results summarized in the paper contribute to the understanding how the microstructure of the novel class of alloys with high configurational entropy influences their mechanical properties. In particular, it has been shown that the equiatomic alloy CrMnFeCoNi exhibits excellent fracture strains up to 80% due to the activation of deformation twinning which operates on length-scales down to nano and micrometers The results were achieved due to a mutual collaboration among the Oak Ridge National Laboratory (US), the Institute of Physics of Materials AS CR (Czech Republic) and the Ruhr University Bochum (Germany). Link to the publication.
Work hardening rate plotted as a function of the true stress for fine-grained CrMnFeCoNi alloy deformed at 77 K (black symbols), 293 K (red symbols) and 473 K (green symbols). The grey area is where geometric instability (necking) is expected according to Considere’s criterion.
FFT-filtered HRTEM image characterizing the mechanism of deformation nano-twinning in the fine-grained CrMnFeCoNi alloy after 20% strain at 77 K.
