Repeatability of Irradiation Damage and of Recovery by Post-Irradiation Annealing of EUROFER Base Steels
Fusion engineering and design(2017)
摘要
Former investigations clearly revealed that embrittlement and hardening of reduced-activation ferritic-martensitic (RAFM) steels after neutron irradiation can be reduced remarkably by post-irradiation annealing (PIA). This study demonstrates the repeatability of damage and recovery mechanisms for EUROFER-based and EUROFER-ODS-HIP-steels by using specimens of previous 330 degrees C Bor 60 reactor (SSC RIAR) irradiations. Specimens were investigated in the irradiated state after a first PIA, after a subsequent further irradiation, and after a second annealing. Both tensile and Charpy-V impact tests clearly indicate that embrittlement occurs after the second irradiation of intermediately annealed (and, thus, recovered) material in the same order as after the first irradiation. In addition, a subsequent PIA leads to a complete recovery of the newly applied neutron damage, suggesting that lifetime of neutron-exposed fusion power plant components could be extended substantially by means of intermediate annealing. (C) 2017 Published by Elsevier B.V.
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关键词
RAFM steel,Irradiation,Post-irradiation annealing,Neutron damage,Recovery,Mechanical testing
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