Ion irradiation effects on the mechanical behavior of vanadium micropillars

Lei Li; Zhixi Zhu; Jiaohui Yan; Shang Chen; Qiuhong Zhang; Yaguang Dong; Xun Guo; Ke Jin; Yunfei Xue

doi:10.1016/j.jnucmat.2025.155784

Ion irradiation effects on the mechanical behavior of vanadium micropillars

Lei Li, Zhixi Zhu, Jiaohui Yan, Shang Chen, Qiuhong Zhang, Yaguang Dong, Xun Guo, Ke Jin^*, Yunfei Xue

^*Corresponding author for this work

Advanced Research Institute of Multidisciplinary Science

School of Materials Science & Engineering, Beijing Institute of Technology

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

Abstract

The present work reports the impact of proton irradiation on the mechanical behavior of vanadium micropillars with various diameters at room temperature. Irradiation induced strengthening appears more significant with increasing pillar size, and the critical diameter to reach size-independent strength is strongly reduced after irradiation to 0.2 dpa. Although all unirradiated pillars deform uniformly, the deformations of the irradiated pillars thicker than 1 μm are concentrated within the top 30 % region, where most irradiation defects are wiped by deformation dislocations, leading to softening and the consequent unique deformation localization behavior.

Original language	English
Article number	155784
Journal	Journal of Nuclear Materials
Volume	610
DOIs	https://doi.org/10.1016/j.jnucmat.2025.155784
Publication status	Accepted/In press - 2025

Keywords

Deformation localization
Ion irradiation
Micropillar compression
Size effect

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10.1016/j.jnucmat.2025.155784

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title = "Ion irradiation effects on the mechanical behavior of vanadium micropillars",

abstract = "The present work reports the impact of proton irradiation on the mechanical behavior of vanadium micropillars with various diameters at room temperature. Irradiation induced strengthening appears more significant with increasing pillar size, and the critical diameter to reach size-independent strength is strongly reduced after irradiation to 0.2 dpa. Although all unirradiated pillars deform uniformly, the deformations of the irradiated pillars thicker than 1 μm are concentrated within the top 30 % region, where most irradiation defects are wiped by deformation dislocations, leading to softening and the consequent unique deformation localization behavior.",

keywords = "Deformation localization, Ion irradiation, Micropillar compression, Size effect",

author = "Lei Li and Zhixi Zhu and Jiaohui Yan and Shang Chen and Qiuhong Zhang and Yaguang Dong and Xun Guo and Ke Jin and Yunfei Xue",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier B.V.",

year = "2025",

doi = "10.1016/j.jnucmat.2025.155784",

language = "English",

volume = "610",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

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TY - JOUR

T1 - Ion irradiation effects on the mechanical behavior of vanadium micropillars

AU - Li, Lei

AU - Zhu, Zhixi

AU - Yan, Jiaohui

AU - Chen, Shang

AU - Zhang, Qiuhong

AU - Dong, Yaguang

AU - Guo, Xun

AU - Jin, Ke

AU - Xue, Yunfei

PY - 2025

Y1 - 2025

N2 - The present work reports the impact of proton irradiation on the mechanical behavior of vanadium micropillars with various diameters at room temperature. Irradiation induced strengthening appears more significant with increasing pillar size, and the critical diameter to reach size-independent strength is strongly reduced after irradiation to 0.2 dpa. Although all unirradiated pillars deform uniformly, the deformations of the irradiated pillars thicker than 1 μm are concentrated within the top 30 % region, where most irradiation defects are wiped by deformation dislocations, leading to softening and the consequent unique deformation localization behavior.

AB - The present work reports the impact of proton irradiation on the mechanical behavior of vanadium micropillars with various diameters at room temperature. Irradiation induced strengthening appears more significant with increasing pillar size, and the critical diameter to reach size-independent strength is strongly reduced after irradiation to 0.2 dpa. Although all unirradiated pillars deform uniformly, the deformations of the irradiated pillars thicker than 1 μm are concentrated within the top 30 % region, where most irradiation defects are wiped by deformation dislocations, leading to softening and the consequent unique deformation localization behavior.

KW - Deformation localization

KW - Ion irradiation

KW - Micropillar compression

KW - Size effect

UR - http://www.scopus.com/inward/record.url?scp=105001712874&partnerID=8YFLogxK

U2 - 10.1016/j.jnucmat.2025.155784

DO - 10.1016/j.jnucmat.2025.155784

M3 - Article

AN - SCOPUS:105001712874

SN - 0022-3115

VL - 610

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 155784

ER -

Ion irradiation effects on the mechanical behavior of vanadium micropillars

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Keywords

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