Enhanced irradiation swelling resistance in low activation Ti8VCrMnFeCu2 high entropy alloys: Exploring the role of heterogeneous nanoparticles

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-01-06 DOI:10.1016/j.jmrt.2025.01.022

Yao Yu , Xiao Liu , Qianqian Wang , Qigui Yang , Ye Dong , Te Zhu , Peng Zhang , Runsheng Yu , Mingpan Wan , Xingzhong Cao

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引用次数: 0

Abstract

This study presents an in-depth analysis on the microstructural evolution of the low-activation Ti₈VCrMnFeCu₂ alloy under helium irradiation. The irradiation-induced vacancies and the change of Cu nanoprecipitates were characterized using slow positron-beam Doppler broadening spectroscopy (DBS) and transmission electron microscopy (TEM). It is revealed that the effective open volume of defects induced by helium irradiation was inhibited at room temperature even at a relatively high dose (3 × 10¹⁷ ions/cm², ∼10.5 dpa). This is attributed to the formation of He_mV_n, which effectively decreases migration and aggregation of vacancies. Moreover, TEM results clearly illustrate the enhanced swelling resistance exhibited in the alloy. The estimated swelling rate is ∼0.092%/dpa with 1 × 10¹⁷ ions/cm² at 723 K. This study demonstrates that Cu nanoprecipitates can effectively serve as traps for helium bubbles, as they capture helium atoms and inhibit their diffusion.

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来源期刊

Journal of Materials Research and Technology-Jmr&t Materials Science-Metals and Alloys

CiteScore

8.80

自引率

9.40%

发文量

1877

审稿时长

35 days

期刊介绍： The Journal of Materials Research and Technology is a publication of ABM - Brazilian Metallurgical, Materials and Mining Association - and publishes four issues per year also with a free version online (www.jmrt.com.br). The journal provides an international medium for the publication of theoretical and experimental studies related to Metallurgy, Materials and Minerals research and technology. Appropriate submissions to the Journal of Materials Research and Technology should include scientific and/or engineering factors which affect processes and products in the Metallurgy, Materials and Mining areas.