Lattice distortions in the FeCoNiCrMn high entropy alloy studied by theory and experiment

H.S. Oh, D Ma, G.P. Leyson, B Grabowski, E.S. Park, F.H.W. Kormann, D. Raabe

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85 Citations (Scopus)
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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.
Original languageEnglish
Article number321
Pages (from-to)1-18
JournalEntropy: international and interdisciplinary journal of entropy and information studies
Volume18
Issue number9
DOIs
Publication statusPublished - 2016

Keywords

  • high entropy alloy
  • lattice distortions
  • density functional theory
  • extended X-ray absorption fine-structure spectroscopy
  • OA-Fund TU Delft

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