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| EFFECTS OF RADIATION AND He ON MICROSTRUCTURES OF LOW ACTIVE FERRITIC/MARTENSITIC STEEL F82H |
| TONG Zhenfeng, DAI Yong, YANG Wen, YANG Qifa |
1) China Insitute of Atomic Energy, Beijing 102413
2) Paul Scherrer Institut, 5232 Villigen PSI, Switzerland |
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Cite this article:
TONG Zhenfeng DAI Yong YANG Wen YANG Qifa. EFFECTS OF RADIATION AND He ON MICROSTRUCTURES OF LOW ACTIVE FERRITIC/MARTENSITIC STEEL F82H. Acta Metall Sin, 2011, 47(7): 965-970.
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Abstract Low active ferritic/martensitic steel, F82H, has been developed as a candidate material for structural
applications of fusion reactors because it has relatively low shifts in ductile-to-brittle transition temperature
(DBTT) and excellent irradiation swell resistance. More works have been done in recent years on the
microstructure and mechanical properties of F82H steel before and after irradiation, but most of the tested samples were
irradiated at low temperature (<400 ℃). In this work, the microstructure of F82H steel irradiated in the Swiss
spallation neutron source SINQ in a temperature range of 150-450 ℃ and a dose range of 6.1-20.2 dpa was
studied. Defect clusters and He bubble were observed by TEM in the irradiated specimens.
The results showed that there existed high density He bubbles with size of 1.6 nm under irradiation temperature higher than
208℃, irradiation dose higher than 9.5 dpa and He concentration 680×10-6. The effects of
irradiation dose, irradiation temperature and He concentration on microstructure of F82H steel were discussed.
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Received: 06 April 2011
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| Fund: Supported by National Basic Research Program of China (No.2011CB610503) and National Natural Science Foundation of China (No.10975194) |
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