Effect of low energy helium irradiation on mechanical properties of 304 stainless steel

Kawakami, Tsukasa; Tokunaga, Kazutoshi; Yoshida, N.

doi:10.1016/j.fusengdes.2005.09.072

Cited by 7 publications

(2 citation statements)

References 6 publications

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“…The formation of bubble-loop complexes inhibited the motion of helium bubbles and dislocation loops [11]. Thus, the existence of micro-defects, such as dislocation loops, vacancies and precipitates, would interact with the helium atoms and restrain their long long-distance diffusion by trapping helium atoms [14]. However, the understanding between defect clusters introduced by irradiation and helium atoms is limited and remains unclear.…”

Section: Introductionmentioning

confidence: 99%

Effect of pre-irradiation defects on helium trapping and diffusion in RAFM steel

et al. 2023

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In order to analyze the effect of pre-irradiation defects on helium trapping and diffusion behaviors in detail by slow positron beam, Si ion with high energies (300 keV and 6 MeV) and 100 eV helium plasma were sequentially introduced into Reduced activation ferritic/martensitic steel. Massive microscopic defects were observed in Si ion irradiated specimens. Low energy helium (~ 100 eV) atoms could diffuse into much deeper region in metals without displacement damage. In the diffusion process of helium atoms, they would be trapped by the Si-ion pre-irradiation defects. The formation of He-vacancy complexes would affect the annihilation of positrons with the electrons in pre-irradiation defects and decrease the S parameters. The shallow region defects induced by 300 keV irradiation have more obvious advantage of hindering the diffusion of helium over the deep defects than that in 6 MeV irradiation. Thus, the pre-introduced defects can trap effectively helium atoms and hinder their diffusion.

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Section: Introductionmentioning

confidence: 99%

Effect of pre-irradiation defects on helium trapping and diffusion in RAFM steel

et al. 2023

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“…Unfortunately, there are potentially many defects in the first wall materials of fusion reactors, such as dislocations, vacancy clusters and precipitates. These defects play a significant role in the trapping of helium atoms and the prevention of their long-range migration [12]. Unfortunately, the mechanism of interaction between helium atoms and defects remains unclear.…”

Section: Introductionmentioning

confidence: 99%

Thermal desorption of helium from defects in nickel

Cao

Sato

et al. 2011

Journal of Nuclear Materials

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a b s t r a c tHelium atoms, introduced into materials by helium plasma or generated by the (n, a) nuclear reaction, have a strong tendency to accumulate at trapping sites such as vacancy clusters and dislocations. In this paper, the effects of dislocations, single vacancies and vacancy clusters on the retention and desorption of helium atoms in nickel were studied. Low energy (0.1-0.15 keV) helium atoms were implanted in nickel with vacancies or dislocations without causing any displacement damage. He atoms, interstitial-type dislocation loops, and vacancy clusters were also introduced with irradiation damage by 5.0 keV helium ions. Helium thermal desorption peaks from dislocations, helium-vacancy clusters and helium bubbles were obtained by thermal desorption spectroscopy at 940 K, in the range from 900 to 1370 K, and at 1500 K, respectively. In addition, a thermally quasi-stable state was found for helium-vacancy clusters.

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Synergistic effect of helium and hydrogen for bubble swelling in reduced-activation ferritic/martensitic steel under sequential helium and hydrogen irradiation at different temperatures

Guo

Chen

et al. 2014

Fusion Engineering and Design

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Effect of low energy helium irradiation on mechanical properties of 304 stainless steel

Cited by 7 publications

References 6 publications

Effect of pre-irradiation defects on helium trapping and diffusion in RAFM steel

Effect of pre-irradiation defects on helium trapping and diffusion in RAFM steel

Thermal desorption of helium from defects in nickel

Synergistic effect of helium and hydrogen for bubble swelling in reduced-activation ferritic/martensitic steel under sequential helium and hydrogen irradiation at different temperatures

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