Absence of long-range chemical ordering in equimolar FeCoCrNi

Journal Article · Sun Jan 01 00:00:00 EST 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4730327· OSTI ID:1047018

Lucas, Matthew ^[1]; Wilks, G B ^[1]; Mauger, L ^[2]; Munoz, Jorge A. ^[3]; Senkov, Oleg ^[4]; Michel, E ^[1]; Horwath, J ^[1]; Semiatin, S L ^[1]; Stone, Matthew B ^[4]; Abernathy, Douglas L ^[4]; Karapetrova, Evgenia ^[5]

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1. Air Force Research Laboratory, Wright-Patterson AFB, OH
2. W. M. Keck Laboratory, Pasadena, CA
3. California Institute of Technology, Pasadena
4. ORNL
5. University of Illinois, Urbana-Champaign

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 FeNi3 was prepared in the same manner to act as a control. Evidence of longrange 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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1047018
• Journal Information: Applied Physics Letters, Vol. 100, Issue 25; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOY SYSTEMS
ALLOYS
ENTROPY
HEAT TREATMENTS
NEUTRONS
SCATTERING
SOLID SOLUTIONS