Study on vacancy-type defects in SIMP steel induced by separate and sequential H and He ion implantation

Jin, Peng; Shen, Tielong; Cui, Minghuan; Zhu, Yabin; Li, Bingsheng; Zhang, Tongmin; Li, Jinyu; Jin, S.; Lu, Eryang; Cao, Xingzhong; Wang, Zhiguang

doi:10.1016/j.jnucmat.2019.04.012

Cited by 26 publications

(7 citation statements)

References 28 publications

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“…Nevertheless, under sequential He-H irradiation, the postimplanted H could be trapped by relatively stable He-V clusters, resulting in the increase of H concentration in the clusters and swelling. In materials under triple beam simultaneously irradiation, the stable He-V clusters would also capture H to form He-H-V clusters and dominate the evolution of cavities (Jin et al, 2019).…”

Section: The Role Of He and H In Synergistic Effectsmentioning

confidence: 99%

Helium-Hydrogen Synergistic Effects in Structural Materials Under Fusion Neutron Irradiation

et al. 2022

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In fusion reactors, 14 MeV high-energy neutron irradiation of structural materials will produce large amounts of helium and hydrogen simultaneously with displacement defects. These He and H atoms will interact with displacement defects, leading to He-H synergistic effects and aggravating the irradiation damage. Currently, there exist no available high-flux fusion neutron sources. Additionally, the neutron energy spectrum and the generation of He and H in fission reactors or spallation neutron sources greatly differ from those in fusion reactors. Multi-ion beam irradiation is a promising method to emulate the synergistic effects induced by fusion neutron irradiation. This review summarizes the experimental studies on the He-H synergistic effects, and analyzes the effects of He and H on cavity evolution and swelling under multi-ion beam irradiation. The roles of various experimental factors are also discussed. More systematically controlled experiments are suggested to develop a comprehensive understanding of He-H synergistic effects in structural materials.

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Section: The Role Of He and H In Synergistic Effectsmentioning

confidence: 99%

Helium-Hydrogen Synergistic Effects in Structural Materials Under Fusion Neutron Irradiation

et al. 2022

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“…Under triple beam simultaneous irradiation, the stable He-V clusters can also trap hydrogen atoms to form He-H-vacancy clusters and dominate the evolution of cavities [200]. He-H-vacancy clusters formed in He-H synergistic effects are believed to be more stable compared to H-V clusters, from which H could dissociate and escape under certain irradiation conditions.…”

Section: He and H Synergistic Effects On Radiation Hardening And Swel...mentioning

confidence: 99%

Helium and Hydrogen Effects in Structural Materials for Nuclear Applications

Karpov¹,

Tolstolutskaya²

2022

Problems of Atomic Science and Technology

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Displacement cascades produce a variety of defects under reactor conditions, but of particular concern is the simultaneous production of helium (He) and hydrogen (H), which enhances the degradation of structural materials. The overall majority of performed studies on helium and hydrogen interactions with materials were based on ion beam irradiation, which served as a convenient tool for the simulation of neutrons exposure over a variety of temperature and dose regimes due to the ability to widely vary and control the irradiation parameters. Experimental investigations of the hydrogen-defect interaction performed by thermal desorption spectroscopy, and the parameters of this interaction obtained by numerical simulations based on diffusion-trapping codes are debated. In this review, we also summarize previous studies on grain boundaries and nanoprecipitate effects on hydrogen transport in metals, as well as the role of hydrogen in the corrosion and cracking of steels. We discuss here issues of helium bubbles formation and some of the evidence for the synergistic effects of hydrogen and helium in the presence of displacement damage, and their influence on irradiation hardening and swelling. Particular attention was devoted to the features of hydrogen interaction with noble-gas bubbles, which were considered on the basis of most recent published data.

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“…Another Chinese reduced activation ferritic/martensitic (RAFM) steel SIMP, with enhanced high-temperature oxidation and liquid metal corrosion resistance, was investigated by DBS and TEM, after sequential H and He (room temperature) implantation, in a very comprehensive work of Jin et al [ 81 ]. Similarly to the study by Xin et al [ 79 ], the increase in the S parameter of the H-implanted sample was found to be higher than in the case of the He-implanted sample, despite the lower displacement damage introduced by hydrogen implantation.…”

Section: Application Of Pas Techniques In Accelerator-based Irradiation Experimentsmentioning

confidence: 99%

Application of Positron Annihilation Spectroscopy in Accelerator-Based Irradiation Experiments

et al. 2021

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Positron annihilation spectroscopy (PAS) is widely recognized as a powerful characterization technique in all types of radiation damage studies in nuclear materials. In the past, fission reactor irradiation of reactor pressure vessel (RPV) steels was a primary aim in most studies, while today’s applications of PAS in this field are centered around ion implantation experiments in advanced structural materials. These experiments use hydrogen, helium, heavy ions, and their combination to simulate various radiation environments of future nuclear reactors or nuclear research facilities. The spectrum of ion energies used ranges from a few tens of keV to tens or even hundreds of MeV in proton irradiation or spallation neutron source irradiation experiments. The variety of ion energies, irradiation temperatures, and other experimental conditions poses a major challenge to researchers, who often fail to successfully incorporate the lessons learned from their research. In this paper, we review and supplement recent PAS studies in which structural materials irradiated under a variety of irradiation conditions were investigated using positron annihilation spectroscopy. It summarizes the most important conclusions and lessons learned from the application of PAS in accelerator-based irradiation experiments.

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Study on vacancy-type defects in SIMP steel induced by separate and sequential H and He ion implantation

Cited by 26 publications

References 28 publications

Helium-Hydrogen Synergistic Effects in Structural Materials Under Fusion Neutron Irradiation

Helium-Hydrogen Synergistic Effects in Structural Materials Under Fusion Neutron Irradiation

Helium and Hydrogen Effects in Structural Materials for Nuclear Applications

Application of Positron Annihilation Spectroscopy in Accelerator-Based Irradiation Experiments

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