Deformation of CoCrFeNi high entropy alloy at large strain
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AbstractThe deformation behavior of an equi-atomic face-centered-cubic CoCrFeNi high entropy alloy was investigated by in-situ neutron diffraction under tensile loading up to 40% applied strain. A three-stage deformation behavior was fully captured by lattice strain and texture evolution. In spite of the chemical complexity, the deformation in CoCrFeNi is dominated by dislocation activities. Analysis of diffraction and microscopy data shows that the deformation progresses from dislocation slip to severe entanglement, where a sharp increase in dislocation density was observed. The neutron diffraction data, corroborated by transmission electron microscopy analysis, provided microscopic insights of the previously reported three-stage hardening behavior.
All Author(s) ListWang B, He HY, Naeem M, Lan S, Harjo S, Kawasaki T, Nie YX, Kui HW, Ungar T, Ma D, Stoica AD, Li Q, Ke YB, Liu CT, Wang XL
Journal nameScripta Materialia
Year2018
Month10
Volume Number155
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Pages54 - 57
ISSN1359-6462
LanguagesEnglish-United Kingdom
KeywordsNeutron diffraction, High entropy alloy, Plastic deformation, Large deformation strain
Web of Science Subject CategoriesNanoscience & Nanotechnology;Materials Science, Multidisciplinary;Metallurgy & Metallurgical Engineering;Science & Technology - Other Topics;Materials Science;Metallurgy & Metallurgical Engineering

Last updated on 2020-09-07 at 00:50