Absence of long-range chemical ordering in equimolar FeCoCrNi

Journal Article · Mon Jun 18 00:00:00 EDT 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4730327· OSTI ID:22080394

Lucas, M S ^[1]; Wilks, G B; Senkov, O N ^[1]; Mauger, L; Munoz, J A ^[2]; Michel, E ^[1]; Horwath, J; Semiatin, S L ^[1]; Stone, M B; Abernathy, D L ^[3]; Karapetrova, E ^[4]

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1. Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433 (United States)
2. California Institute of Technology, W. M. Keck Laboratory 138-78, Pasadena, California 91125 (United States)
3. Oak Ridge National Laboratory, 1, Bethel Valley Road, Oak Ridge, Tennessee 37831 (United States)
4. Argonne National Laboratory, Argonne, Illinois 60439 (United States)

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{sub 3} was prepared in the same manner to act as a control. Evidence of long-range chemical ordering is clearly observed in the annealed FeNi{sub 3} sample from both experimental techniques. The FeCoCrNi sample given the same heat treatment lacks long-range chemical order.

• OSTI ID: 22080394
• Journal Information: Applied Physics Letters, Vol. 100, Issue 25; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOY SYSTEMS
ANNEALING
CHROMIUM ALLOYS
COBALT ALLOYS
CONTROL
DATES
ENTROPY
IRON ALLOYS
MATERIALS
MIXING
NEUTRON DIFFRACTION
NICKEL ALLOYS
QUENCHING
RANDOMNESS
SOLID SOLUTIONS
X-RAY DIFFRACTION