CREEP AND CREEP FRACTURE OF AN OXIDE-DISPERSION-STRENGTHENED 13-PERCENT CHROMIUM FERRITIC STEEL

Short-term creep data for the oxide-dispersion-strengthened 13% chromi um ferritic steel, DT2203YO5, have been analysed using the theta Proje ction Concept. The theta methodology is shown to rationalize the compl ex behaviour patterns recorded when traditional power-law equations ar e used to describe the creep characteristics of ODS alloys. Moreover, the robust form of the theta relationships allows estimates of long-te rm creep and creep-fracture properties to be obtained, despite the var iability of the property values recorded for alloy DT2203YO5 in tests of short duration.