Material science and manufacturing of heat-resistant reduced-activation ferritic-martensitic steels for fusion

A number of issues regarding the development and use of 10-12% Cr reduced-a ctivation ferritio-martensitic steels (RAFMS) for fusion are considered. Th ese include: (1) problems of manufacturing and modifying their composition and metallurgical condition; (2) the influence on properties of their compo sition, purity, delta -ferrite concentration and cooling rates in the final stages of manufacturing; and (3) the effects of neutron irradiation at 320 -650 degreesC up to 108 dpa on their mechanical properties. In addition, ne utron activation and nuclear accumulation of elements in RAFMS with differe nt initial concentrations of alloying and impurity elements for typical fus ion reactor (DEMO) irradiation regimes have been calculated. (C) 2000 Elsev ier Science B.V. All rights reserved.