Suppressed radiation-induced dynamic recrystallization in CrFeCoNiCu high-entropy alloy. (1st January 2021)

• Record Type: Journal Article
• Authors: Kim, Jinyeon; Lim, Jong Wook; Kim, Joon Kon; Kim, Do Hyang; Park, Eun Soo; Chang, Hye Jung
• Is Part Of: Scripta materialia. Number 190(2021)
• Page Start: 158
• Page End: 162
• Publication Date: 2021-01-01
• Subjects: High-entropy alloy -- Irradiation damage -- Discontinuous dynamic recrystallization -- Transmission electron microscopy -- Precession electron diffraction; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.08.045
• Languages: English
• ISSNs: 1359-6462

Abstract

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. Graphical abstract: Image, graphical abstract