  Density functional theory based computational study has been conducted in
order to investigate the effect of substitution of Cr and Co components by Si
on the structure, mechanical, electronic, and magnetic properties of the high
entropy alloy CrCoNiFe. It is found that the presence of a moderate
concentration of Si substitutes (up to 12.5 %) does not significantly reduce
the structural and mechanical stability of CrCoNiFe while it may modify its
electronic and magnetic properties. Based on that, Si is proposed as a cheap
and functional material for partial substitution of Cr or Co in CrCoNiFe.
