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The effect of hydrogen-helium synergism on dislocation loops in RAFM steel at different temperatures by dual-beam ion irradiation
被引:0
|作者:
Xie, Ziyang
[1
,2
]
Long, Yunxiang
[1
,2
]
Chen, Yiheng
[1
,2
]
Luo, Hongtai
[1
,2
]
Lin, Wenbin
[1
,2
]
Yin, Zepeng
[1
,2
]
Cao, Junjie
[1
,2
]
Lin, Silong
[1
,2
]
Yan, Rui
[1
,2
]
Mo, Shaobo
[3
]
Guo, Liping
[1
,2
]
机构:
[1] Wuhan Univ, Minist Educ, Key Lab Artificial Micro & Nanostruct, Hubei Nucl Solid Phys Key Lab, Wuhan 430072, Peoples R China
[2] Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Peoples R China
[3] Wuhan Univ, Anal & Testing Ctr, Wuhan 430072, Hubei, Peoples R China
基金:
中国国家自然科学基金;
关键词:
Rafm steel;
Dual-beam irradiation;
H/he synergistic effect;
Dislocation loop;
Irradiation hardening;
MECHANICAL PROPERTY;
GAS ATOMS;
HE;
EVOLUTION;
IRON;
CR;
1ST-PRINCIPLES;
DISPLACEMENT;
SIMULATION;
COMPLEXES;
D O I:
10.1016/j.jnucmat.2024.155071
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
Simultaneous Fe+ H ion irradiation (denoted as Fe+ H ) and Fe+ H ion irradiation with pre-implantation of He (denoted as He/Fe+ H ) were carried out on Chinese Low-Activation Martensitic (CLAM) steels at 350 degrees C-550 degrees C to investigate the synergistic effect between H and He. The peak dose was 15 dpa, the He concentration in the observation area was 11 appm/dpa and the H concentration was 44 appm/dpa. The microstructure and hardening of the irradiated samples were evaluated by TEM and nanoindentation, respectively. Bubbles were not observed in irradiated CLAM steels at all temperatures, which implies that the promotion of bubbles by H may not be as strong as that by He and that H attenuates the promotion of bubbles by He. The hardening induced by He/Fe+ H irradiation at 450 degrees C is about 1.6 times that of Fe+ H irradiation, the synergistic effect of H and He is most significant at this temperature. Comparison with Fe+He irradiation and single Fe irradiation reveals that Fe+ H irradiation at 350 degrees C induces lower interstitial defect damage than Fe+He irradiation, but the level of interstitial defects induced by the synergistic effect of both H and He with displacement damage is comparable at higher temperatures. The average size of dislocation loops induced by Fe+ H irradiation is between that of single Fe irradiation and Fe+He irradiation, but the number density of dislocation loops induced by Fe+ H irradiation is higher than that of Fe+He irradiation. The synergistic effect of He with displacement damage tends to promote the growth of dislocation loops, while the synergistic effect of H tends to promote the nucleation of dislocation loops.
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页数:11
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