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Precipitation hardening of high entropy alloy CoCrFeMnNi containing titanium

: Eißmann, N.; Mühle, U.; Gaitzsch, U.; Walther, G.; Weißgärber, T.; Kieback, B.


Journal of alloys and compounds 857 (2021), Art. 157610
ISSN: 0925-8388
Journal Article
Fraunhofer IFAM ()

The effect of titanium addition beyond the solubility limit was investigated in order to proof the precipitation hardening possibility of the Cantor alloy CoCrFeMnNi. As high entropy alloys are currently in the focus of interest, this method is a highly suitable possibility to further improve their remarkably properties. After appropriate heat treatment consisting of homogenisation, solution and precipitation annealing a significant increase in hardness was detected. The high hardness was caused by nanometer sized precipitates, which were identified by TEM-analysis.