Intrinsic properties of the Cantor's alloy at high temperature and their modifications by addition of other elements

The equimolar CoNiFeMnCr high entropy alloy (usually called Cantor's) alloy was elaborated by foundry to investigate its properties at high temperature. In the present chemical state, at 1000°C and beyond, it is mechanically weak and oxidizes very quickly. A series of modifications, chemical (decrease in Cr, increase in Cr, Ti addition, Ta addition) and microstructural (formation of interdendritic eutectic HfC or TaC carbides with a script-like morphology), were applied and significant improvements in creep resistance and in oxidation kinetic were obtained.