Suppressed radiation-induce d dynamic recrystallization in CrFeCoNiCu high-entropy alloy

Title
Suppressed radiation-induce d dynamic recrystallization in CrFeCoNiCu high-entropy alloy
Authors
장혜정김준곤임종욱김진연김도향박은수
Keywords
High-entropy alloy; Irradiation damage; Discontinuous dynamic recrystallization; Transmission electron microscopy; Precession electron diffraction
Issue Date
2021-01
Publisher
Scripta materialia
Citation
VOL 190-162
Abstract
We report a map of irradiation-induced recrystallization and polygonization in a CrFeCoNiCu high-entropy alloy obtained by a precession electron diffraction technique. This orientation map enables the visualization of depth-dependent recrystallization at a glance and reveals the effects of irradiation dose and material entropy. Discontinuous dynamic recrystallization preferentially occurs near the surface, where the irradiation dose is low, but radiation-enhanced diffusion dominantly occurs leading to dislocation climb even at room temperature. Interestingly, in the high-entropy phase with a relatively low stacking fault energy, discontinuous dynamic recrystallizastion is suppressed due to the lower stored energy and grain boundary diffusivity compared low-entropy one.
URI
http://pubs.kist.re.kr/handle/201004/72670
ISSN
1359-6462
Appears in Collections:
KIST Publication > Article
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