Abstract
Neutron total-scattering experiments were conducted to search for signatures of the short-range ordering in medium-entropy alloys Tr-Co-Ni (Tr = Cr, Mn, and Fe). The reduced pair distribution function of the Mn-Co-Ni sample clearly deviates from that of the fully random face-centered cubic structure, whereas those of the as-quenched Cr-Co-Ni and Fe-Co-Ni samples can be explained with an almost random face-centered cubic structure model. The results of neutron thermal analyses and reverse Monte Carlo structure modeling indicate a possible compositional and/or magnetic short-range ordering in the Mn-Co-Ni system.
| Original language | English |
|---|---|
| Pages (from-to) | 995-1000 |
| Number of pages | 6 |
| Journal | Materials Transactions |
| Volume | 65 |
| Issue number | 9 |
| DOIs | |
| State | Published - Sep 1 2024 |
| Externally published | Yes |
Funding
One of the authors (YI) thanks Dr. M. Enoki and Prof. H. Ohtani for their helpful advice. We also thank Mr. M. Ohkawara for his kind support on the neutron experiments at JRR-3. We would like to thank the kind support of Dr. T. Toyama and Dr. K. Inoue (IRCNMS, IMR Oarai, Tohoku University) for preliminary positron lifetime measurements. This work was supported by JSPS KAKENHI Grant Number (JP19H05164 and JP21H00139), and partly by JP24K01143. A part of this work was supported by the Collaborative Research Center on Energy Materials, E-IMR. We wish to thank the Analytical Research Core for Advanced Materials at the Institute for Materials Research, Tohoku University for experimental support for the chemical composition analysis using the XRF spectrometer. Total neutron scattering experiments were performed under a user program of MLF J-PARC (2020A0276). The neutron scattering experiments were performed under the Joint-Use Research Program for Neutron Scattering, Institute for Solid State Physics (ISSP), University of Tokyo, and the Japan Research Reactor JRR-3 (6G IRT Program 23402). We gratefully acknowledge support from the Center of Neutron Science for Advanced Materials, Institute for Materials Research, Tohoku University.
Keywords
- high-entropy alloys
- neutron
- short-range ordering
- structural modeling
- structural relaxation
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