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Entropy 2016, 18(9), 321; doi:10.3390/e18090321

Lattice Distortions in the FeCoNiCrMn High Entropy Alloy Studied by Theory and Experiment

1
Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Korea
2
Max-Planck-Institut für Eisenforschung GmbH, 40237 Düsseldorf, Germany
3
Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands
*
Authors to whom correspondence should be addressed.
Academic Editor: An-Chou Yeh
Received: 8 July 2016 / Revised: 17 August 2016 / Accepted: 29 August 2016 / Published: 2 September 2016
(This article belongs to the Special Issue High-Entropy Alloys and High-Entropy-Related Materials)
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Abstract

Lattice distortions constitute one of the main features characterizing high entropy alloys. Local lattice distortions have, however, only rarely been investigated in these multi-component alloys. We, therefore, employ a combined theoretical electronic structure and experimental approach to study the atomistic distortions in the FeCoNiCrMn high entropy (Cantor) alloy by means of density-functional theory and extended X-ray absorption fine structure spectroscopy. Particular attention is paid to element-resolved distortions for each constituent. The individual mean distortions are small on average, <1%, but their fluctuations (i.e., standard deviations) are an order of magnitude larger, in particular for Cr and Mn. Good agreement between theory and experiment is found. View Full-Text
Keywords: high entropy alloy; lattice distortions; density functional theory; extended X-ray absorption fine-structure spectroscopy high entropy alloy; lattice distortions; density functional theory; extended X-ray absorption fine-structure spectroscopy
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MDPI and ACS Style

Oh, H.S.; Ma, D.; Leyson, G.P.; Grabowski, B.; Park, E.S.; Körmann, F.; Raabe, D. Lattice Distortions in the FeCoNiCrMn High Entropy Alloy Studied by Theory and Experiment. Entropy 2016, 18, 321.

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