Abstract

The study of microstructural radiation damage in metallic materials is of utmost importance in a large variety of technical fields related to energy production plants; more specifically the availability of radiation resistant alloys is at present considered as a key issue for the development of commercial fusion reactors. Since its earliest applications, Small-angle neutron scattering (SANS) has provided an effective investigation tool characterizing in a nondestructiveway the presence and the evolution of microstructural defects associated with radiation damage in pure metals and technical alloys. The main SANS studies in this domain are reviewed. including the most recent results of a research programme concerning the characterization of He-bubble growth in a martensitic steel proposed as structural material for fusion reactors (MANET).

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