氦离子辐照下6061-Al合金中的氦泡行为研究

doi:10.11896/cldb.22030107

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Abstract In the work, the evolution behavior of helium bubbles in nuclear-grade 6061-Al alloy was studied by 190 keV He ion irradiation at room temperature with irradiation fluences of 2×10¹⁵ cm^-2, 1×10¹⁶ cm^-2, 1×10¹⁷ cm^-2 and 2×10¹⁷ cm^-2, respectively. The surface damage and he-lium bubbles induced by ion irradiation were characterized combining scanning electron microscopy (SEM), atomic force microscopy (AFM) and transmission electron microscopy (TEM). The surface blistering is found to increase obviously with the increasing fluences which contributes to the increasing roughness. Preliminary calculation shows that most of the incident He contribute to the surface blistering while only a small fraction are distributed in the material matrix to form uniform helium bubbles. With the increasing fluences, the He bubble size first remains stable which is independent of fluence, and then increases significantly at higher fluences. Compared with the bubble size change, the bubble density undergoes increase hereafter decrease. In addition, preferential aggregation and growth of helium bubbles on precipitates and grain boundaries which act as the favorable sites for bubble formation were observed. The study of the evolution behavior of helium bubbles is of great significance for fundamental research and understanding the degradation of macroscopic mechanical properties and possible irradiation failure behavior of aluminum alloy in the research reactor.

Key words： aluminum alloys He bubble helium ion irradiation surface blister precipitates

Published: Online: 2024-01-16

CLC number:

TL341

Fund:Nuclear Energy Development Project from State Administration of Science,Technology and Industry for National Defense, PRC.

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	Articles by authors
	YAN Zhanfeng
	ZHENG Jian
	ZHOU Wei
	WANG Hao

Cite this article:

YAN Zhanfeng,ZHENG Jian,ZHOU Wei, et al. Helium Bubble Behavior in 6061-Aluminum Alloys Under Helium Ion Irradiation[J]. Materials Reports, 2024, 38(1): 22030107-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22030107 OR http://www.mater-rep.com/EN/Y2024/V38/I1/22030107

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