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

doi:10.1016/j.scriptamat.2020.08.045

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

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

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 language	English
Pages (from-to)	158-162
Number of pages	5
Journal	Scripta Materialia
Volume	190
DOIs	https://doi.org/10.1016/j.scriptamat.2020.08.045
Publication status	Published - 2021 Jan 1

Bibliographical note

Funding Information:
The authors appreciate Cheol Hwee Shim and Gi Hoon Park for technical support with PED-OIM and TEM sample preparation using FIB, respectively. This research was supported by the National Nuclear R&D Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT [grant number 2013M2A8A1042255 ] and the KIST Institutional Program [grant number 2V08170 ]. J.Y. Kim and E.S. Park were supported by a National Research Foundation of Korea grant funded by the Korean government (Ministry of Science and ICT) [grant number NRF-2019M3D1A1079215 ] and the Institute of Engineering Research at Seoul National University .

Publisher Copyright:
© 2020 Acta Materialia Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

All Science Journal Classification (ASJC) codes

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

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10.1016/j.scriptamat.2020.08.045

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title = "Suppressed radiation-induced dynamic recrystallization in CrFeCoNiCu high-entropy alloy",

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.",

author = "Jinyeon Kim and Lim, {Jong Wook} and Kim, {Joon Kon} and Kim, {Do Hyang} and Park, {Eun Soo} and Chang, {Hye Jung}",

note = "Funding Information: The authors appreciate Cheol Hwee Shim and Gi Hoon Park for technical support with PED-OIM and TEM sample preparation using FIB, respectively. This research was supported by the National Nuclear R&D Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT [grant number 2013M2A8A1042255 ] and the KIST Institutional Program [grant number 2V08170 ]. J.Y. Kim and E.S. Park were supported by a National Research Foundation of Korea grant funded by the Korean government (Ministry of Science and ICT) [grant number NRF-2019M3D1A1079215 ] and the Institute of Engineering Research at Seoul National University . Publisher Copyright: {\textcopyright} 2020 Acta Materialia Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)",

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AU - Chang, Hye Jung

N1 - Funding Information: The authors appreciate Cheol Hwee Shim and Gi Hoon Park for technical support with PED-OIM and TEM sample preparation using FIB, respectively. This research was supported by the National Nuclear R&D Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT [grant number 2013M2A8A1042255 ] and the KIST Institutional Program [grant number 2V08170 ]. J.Y. Kim and E.S. Park were supported by a National Research Foundation of Korea grant funded by the Korean government (Ministry of Science and ICT) [grant number NRF-2019M3D1A1079215 ] and the Institute of Engineering Research at Seoul National University . Publisher Copyright: © 2020 Acta Materialia Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

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N2 - 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.

AB - 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.

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

Abstract

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