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Constitutive modeling of deformation behavior of high-entropy alloys with face-centered cubic crystal structure

Title
Constitutive modeling of deformation behavior of high-entropy alloys with face-centered cubic crystal structure
Authors
Jang, M.J.Ahn, D.-H.Moon, J.Bae, J.W.Yim, D.Yeh, J.-W.Estrin, Y.Kim, H.S.
Date Issued
Feb-2017
Publisher
TAYLOR & FRANCIS INC
Abstract
A constitutive model based on the dislocation glide and deformation twinning is adapted to face-centered cubic high-entropy alloys (HEAs) as exemplified by the CrMnFeCoNi system. In this model, the total dislocation density is considered as the only internal variable, while the evolution equation describing its variation during plastic deformation is governed by the volume fraction of twinned material. The suitability of the model for describing the strain hardening behavior of HEAs was verified experimentally through compression tests on alloy CrMnFeCoNi and its microstructure characterization by electron backscatter diffraction and X-ray diffraction using synchrotron radiation. ? 2017 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
URI
http://oasis.postech.ac.kr/handle/2014.oak/50443
ISSN
2166-3831
Article Type
Article
Citation
Materials Research Letters, vol. 5, no. 5, page. 350 - 356, 2017-02
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 KIM, HYOUNG SEOP
Dept of Materials Science & Enginrg
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