On the hot-worked microstructure of a face-centered cubic Al0.3CoCrFeNi high entropy alloy. (15th March 2020)

• Record Type: Journal Article
• Authors: Haghdadi, N.; Primig, S.; Annasamy, M.; Cizek, P.; Hodgson, P.D.; Fabijanic, D.M.
• Is Part Of: Scripta materialia. Number 178(2020)
• Page Start: 144
• Page End: 149
• Publication Date: 2020-03-15
• Subjects: High entropy alloys -- Dynamic recrystallization -- Microbands -- Dislocation boundaries; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.11.022
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: 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. Graphical abstract: Image, graphical abstract