Suppressed radiation-induced dynamic recrystallization in CrFeCoNiCu high-entropy alloy

Jinyeon Kim, Jong Wook Lim, Joon Kon Kim, Do Hyang Kim, Eun Soo Park, Hye Jung Chang

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)158-162
Number of pages5
JournalScripta Materialia
Volume190
DOIs
Publication statusPublished - 2021 Jan 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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