Microstructure and microhardness of CLAM steel irradiated up to 20.8 dpa in STIP-V

Specimens of China low activation martensitic (CLAM) steel were irradiated in the fifth experiment of SINQ target irradiation program (STIP-V) up to 20.8 dpa/1564 appm He. Microhardness measurements and transmission electron microscope (TEM) observations have been performed to investigate irradiatio...

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Bibliographic Details
Published inJournal of nuclear materials Vol. 468; pp. 255 - 259
Main Authors Peng, Lei, Ge, Hongen, Dai, Yong, Huang, Qunying, Ye, Minyou
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.01.2016
Subjects
Bubbles
CLAM
Defects
Density
Hardness
Irradiation
Martensitic stainless steels
Microhardness
Microstructure
Nuclear engineering
Steels
China, People's Rep
Irradiation
CLAM
Hardness
Microstructure
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Summary:Specimens of China low activation martensitic (CLAM) steel were irradiated in the fifth experiment of SINQ target irradiation program (STIP-V) up to 20.8 dpa/1564 appm He. Microhardness measurements and transmission electron microscope (TEM) observations have been performed to investigate irradiation induced hardening effects. The results of CLAM steel specimens show similar trend in microhardness and microstructure changes with irradiation dose, compared to F82H/Optimax-A steels irradiated in STIP-I/II. Defects and helium bubbles were observed in all specimens, even at a very low dose of 5.4 dpa. For defects and bubbles, the mean size and number density increased with increasing irradiation dose to 13 dpa, and then the mean size increased and number density decreased with the increasing irradiation dose to 20.8 dpa.
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ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2015.11.023