Absence of long-range chemical ordering in equimolar FeCoCrNi

M. S. Lucas, G. B. Wilks, L. Mauger, J. A. Muñoz, O. N. Senkov, E. Michel, J. Horwath, S. L. Semiatin, M. B. Stone, D. L. Abernathy, E. Karapetrova
2012 Applied Physics Letters  
Equimolar FeCoCrNi alloys have been the topic of recent research as "high-entropy alloys," where the name is derived from the high configurational entropy of mixing for a random solid solution. Despite their name, no systematic study of ordering in this alloy system has been performed to date. Here, we present results from anomalous x-ray scattering and neutron scattering on quenched and annealed samples. An alloy of FeNi 3 was prepared in the same manner to act as a control. Evidence of
more » ... nge chemical ordering is clearly observed in the annealed FeNi 3 sample from both experimental techniques. The FeCoCrNi sample given the same heat treatment lacks longrange chemical order.
doi:10.1063/1.4730327 fatcat:3xgradg2ana2taeyksqwx6i3ua