Microstructural response of He+ irradiated FeCoNiCrTi0.2 high-entropy alloy

Da Chen; Y. Tong; J. Wang; B. Han; Y. L. Zhao; F. He; J. J. Kai

doi:10.1016/j.jnucmat.2018.08.006

Microstructural response of He⁺ irradiated FeCoNiCrTi_0.2 high-entropy alloy

Da Chen, Y. Tong, J. Wang, B. Han, Y. L. Zhao, F. He, J. J. Kai

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

34 Scopus citations

Abstract

In the He⁺ irradiated FeCoNiCrTi_0.2 high-entropy alloy (HEA), radiation-induced defects including helium bubbles and faulted dislocation loops were characterized by transmission electron microscopy. Compared with other face-centered cubic alloys irradiated in similar conditions, we found that the faulted loops in the FeCoNiCrTi_0.2 HEA have a much large size, whereas the perfect loops were rarely detected. Our results reveal that the faulted-type defect structure is more energetically favorable in the FeCoNiCrTi_0.2 HEA, whereas the transformation of the faulted to perfect dislocation loops was suppressed. For the underlying mechanism, we propose that the low stacking fault energy can stabilize the faulted planar defects during irradiation.

Original language	English
Pages (from-to)	187-192
Number of pages	6
Journal	Journal of Nuclear Materials
Volume	510
DOIs	https://doi.org/10.1016/j.jnucmat.2018.08.006
State	Published - Nov 2018
Externally published	Yes

Keywords

Faulted dislocation loops
Helium bubbles
High-entropy alloy
Stacking fault energy

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10.1016/j.jnucmat.2018.08.006

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title = "Microstructural response of He+ irradiated FeCoNiCrTi0.2 high-entropy alloy",

abstract = "In the He+ irradiated FeCoNiCrTi0.2 high-entropy alloy (HEA), radiation-induced defects including helium bubbles and faulted dislocation loops were characterized by transmission electron microscopy. Compared with other face-centered cubic alloys irradiated in similar conditions, we found that the faulted loops in the FeCoNiCrTi0.2 HEA have a much large size, whereas the perfect loops were rarely detected. Our results reveal that the faulted-type defect structure is more energetically favorable in the FeCoNiCrTi0.2 HEA, whereas the transformation of the faulted to perfect dislocation loops was suppressed. For the underlying mechanism, we propose that the low stacking fault energy can stabilize the faulted planar defects during irradiation.",

keywords = "Faulted dislocation loops, Helium bubbles, High-entropy alloy, Stacking fault energy",

author = "Da Chen and Y. Tong and J. Wang and B. Han and Zhao, {Y. L.} and F. He and Kai, {J. J.}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = nov,

doi = "10.1016/j.jnucmat.2018.08.006",

language = "英语",

volume = "510",

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journal = "Journal of Nuclear Materials",

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TY - JOUR

T1 - Microstructural response of He+ irradiated FeCoNiCrTi0.2 high-entropy alloy

AU - Chen, Da

AU - Tong, Y.

AU - Wang, J.

AU - Han, B.

AU - Zhao, Y. L.

AU - He, F.

AU - Kai, J. J.

PY - 2018/11

Y1 - 2018/11

N2 - In the He+ irradiated FeCoNiCrTi0.2 high-entropy alloy (HEA), radiation-induced defects including helium bubbles and faulted dislocation loops were characterized by transmission electron microscopy. Compared with other face-centered cubic alloys irradiated in similar conditions, we found that the faulted loops in the FeCoNiCrTi0.2 HEA have a much large size, whereas the perfect loops were rarely detected. Our results reveal that the faulted-type defect structure is more energetically favorable in the FeCoNiCrTi0.2 HEA, whereas the transformation of the faulted to perfect dislocation loops was suppressed. For the underlying mechanism, we propose that the low stacking fault energy can stabilize the faulted planar defects during irradiation.

AB - In the He+ irradiated FeCoNiCrTi0.2 high-entropy alloy (HEA), radiation-induced defects including helium bubbles and faulted dislocation loops were characterized by transmission electron microscopy. Compared with other face-centered cubic alloys irradiated in similar conditions, we found that the faulted loops in the FeCoNiCrTi0.2 HEA have a much large size, whereas the perfect loops were rarely detected. Our results reveal that the faulted-type defect structure is more energetically favorable in the FeCoNiCrTi0.2 HEA, whereas the transformation of the faulted to perfect dislocation loops was suppressed. For the underlying mechanism, we propose that the low stacking fault energy can stabilize the faulted planar defects during irradiation.

KW - Faulted dislocation loops

KW - Helium bubbles

KW - High-entropy alloy

KW - Stacking fault energy

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U2 - 10.1016/j.jnucmat.2018.08.006

DO - 10.1016/j.jnucmat.2018.08.006

M3 - 文章

AN - SCOPUS:85051273939

SN - 0022-3115

VL - 510

SP - 187

EP - 192

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Microstructural response of He⁺ irradiated FeCoNiCrTi_0.2 high-entropy alloy

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Keywords

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