Journal
SCRIPTA MATERIALIA
Volume 210, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2021.114470
Keywords
High entropy alloys; Lattice distortion; Pair distribution function; Solid solution strengthening
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Chemical compositions in the TiNbHfTaZr HEA system were found to have significant effects on lattice distortion and solid solution strengthening, with lattice distortion levels being proportional to atomic size misfit.
Systematic variations of chemical compositions in TiNbHfTaZr HEA system were designed for an investigation of compositional complexity and chemical composition effects on lattice distortion. The lattice distortion was quantitatively analyzed by using the pair distribution function (PDF) method. The levels of lattice distortion were proportional to the atomic size misfit rather than the compositional complexity in the TiNbHfTaZr HEA system. The more pronounced lattice distortion in the TiNbHfTaZr HEA system increases the solid solution strengthening. The study suggested that the atomic size misfit is one of the foremost considerations on lattice distortion and solid solution strengthening in the TiNbHfTaZr HEA system. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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