Absence of long-range chemical ordering in equimolar FeCoCrNi

作者：Lucas M S^*; Wilks G B; Mauger L; Munoz J A; Senkov O N; Michel E; Horwath J; Semiatin S L; Stone M B; Abernathy D L; Karapetrova E

来源：Applied Physics Letters, 2012, 100(25): 251907.

DOI：10.1063/1.4730327

Equimolar FeCoCrNi alloys have been the topic of recent research as %26quot;high-entropy alloys,%26quot; 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 FeNi3 was prepared in the same manner to act as a control. Evidence of long-range chemical ordering is clearly observed in the annealed FeNi3 sample from both experimental techniques. The FeCoCrNi sample given the same heat treatment lacks long-range chemical order.

• 出版日期2012-6-18