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On the hot-worked microstructure of a face-centered cubic Al0.3CoCrFeNi high entropy alloy

journal contribution
posted on 2020-03-15, 00:00 authored by N Haghdadi, S Primig, Murugesan Annasamy, Pavel CizekPavel Cizek, Peter HodgsonPeter Hodgson, Daniel FabijanicDaniel Fabijanic
© 2019 Acta Materialia Inc. Hot deformation mechanisms and restoration behavior of a single-phase face-centered cubic high entropy alloy was studied. The hot-deformed microstructure consisted of complex shaped deformation/transition bands. For the first time in these alloys, self-screening microband arrays were detected. The microbands were of highly crystallographic nature, i.e., they were aligned with traces of {111} slip planes containing slip systems having the highest or second highest possible Schmid factors. Dynamic recrystallization initiated mainly at the initial grain boundaries through strain-induced boundary migration generally followed by the formation of multiple twinning chains. Also, micro-shear-band induced recrystallization was observed locally, mainly due to strain localization.

History

Journal

Scripta Materialia

Volume

178

Pagination

144 - 149

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

1359-6462

Language

eng

Publication classification

C1 Refereed article in a scholarly journal