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Absence of long-range chemical ordering in equimolar FeCoCrNi

Lucas, M. S. and Wilks, G. B. and Mauger, L. and Muñoz, J. A. and Senkov, O. N. and Michel, E. and Horwath, J. and Semiatin, S. L. and Stone, M. B. and Abernathy, D. L. and Karapetrova, E. (2012) Absence of long-range chemical ordering in equimolar FeCoCrNi. Applied Physics Letters, 100 (25). Art. No. 251907. ISSN 0003-6951. doi:10.1063/1.4730327.

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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.

Item Type:Article
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Stone, M. B.0000-0001-7884-9715
Abernathy, D. L.0000-0002-3533-003X
Additional Information:© 2012 American Institute of Physics. Received 27 February 2012; accepted 6 June 2012; published online 20 June 2012. 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.
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC02-06CH11357
Subject Keywords:annealing; chromium alloys; cobalt alloys; entropy; iron alloys; long-range order; materials preparation; mixing; neutron diffraction; nickel alloys; quenching (thermal); solid solutions; X-ray scattering
Issue or Number:25
Classification Code:PACS:; 64.75.Ef; 81.40.Gh; 78.70.Ck; 81.05.Bx
Record Number:CaltechAUTHORS:20120725-114554376
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Official Citation:Absence of long-range chemical ordering in equimolar FeCoCrNi M. S. Lucas, G. B. Wilks, L. Mauger, J. A. Munoz, O. N. Senkov, E. Michel, J. Horwath, S. L. Semiatin, M. B. Stone, D. L. Abernathy, and E. Karapetrova, Appl. Phys. Lett. 100, 251907 (2012), DOI:10.1063/1.4730327
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:32715
Deposited By: Aucoeur Ngo
Deposited On:25 Jul 2012 20:12
Last Modified:09 Nov 2021 21:29

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