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

doi:10.1063/1.4730327

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

Direct Geometry

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Abstract

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 long-range chemical ordering is clearly observed in the annealed FeNi ₃ sample from both experimental techniques. The FeCoCrNi sample given the same heat treatment lacks long-range chemical order.

Original language	English
Article number	251907
Journal	Applied Physics Letters
Volume	100
Issue number	25
DOIs	https://doi.org/10.1063/1.4730327
State	Published - Jun 18 2012

Funding

Use of the Advanced Photon Source was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. A portion of this research at Oak Ridge National Laboratory’s Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. This work benefitted from danse software developed under NSF Grant No. DMR-0520547.

Funders	Funder number
Scientific User Facilities Division
National Science Foundation	DMR-0520547
U.S. Department of Energy
Office of Science
Basic Energy Sciences	DE-AC02-06CH11357
Oak Ridge National Laboratory

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abstract = "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 long-range chemical ordering is clearly observed in the annealed FeNi 3 sample from both experimental techniques. The FeCoCrNi sample given the same heat treatment lacks long-range chemical order.",

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AU - Lucas, M. S.

AU - Wilks, G. B.

AU - Mauger, L.

AU - Muñoz, J. A.

AU - Senkov, O. N.

AU - Michel, E.

AU - Horwath, J.

AU - Semiatin, S. L.

AU - Stone, M. B.

AU - Abernathy, D. L.

AU - Karapetrova, E.

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Absence of long-range chemical ordering in equimolar FeCoCrNi

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