핵융합로용 저방사화 철강재료(RAFs)의 크리프 특성평가
Evaluation on Creep Properties of Reduced Activation Ferritic Steel(RAFs) for Nuclear Fusion Reactor
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초록
Reduced Activation Ferritic1Martensitic Steels (RAFs) are leading candidates for structural materials of a D-T fusion reactor. One of the RAFs, JLF-1 (9Cr-2W-V, Ta) has been developed and has shown to have good resistance against high-fluency neutrino irradiation and good phase stability. Recently, in order to clarify the strengthening mechanisms at high temperatures, a new scheme to improve high temperature mechanical properties is desired. Therefore, the test technique development of high temperature creep behaviors for this material is very important. In this paper, the creep properties and creep life prediction, using the Larson-Miller parameter method for JLF-4 to be used for fusion reactor materials or other high temperature components, are presented at the elevated temperatures of 500℃, 550℃, 600℃, 650℃ and 704℃. It was confirmed, experimentally and quantitatively, that a creep life predictive equation, at such various high temperatures, is well derived by the LMP method.
Abstract
Reduced Activation Ferritic1Martensitic Steels (RAFs) are leading candidates for structural materials of a D-T fusion reactor. One of the RAFs, JLF-1 (9Cr-2W-V, Ta) has been developed and has shown to have good resistance against high-fluency neutrino irradiation and good phase stability. Recently, in order to clarify the strengthening mechanisms at high temperatures, a new scheme to improve high temperature mechanical properties is desired. Therefore, the test technique development of high temperature creep behaviors for this material is very important. In this paper, the creep properties and creep life prediction, using the Larson-Miller parameter method for JLF-4 to be used for fusion reactor materials or other high temperature components, are presented at the elevated temperatures of 500℃, 550℃, 600℃, 650℃ and 704℃. It was confirmed, experimentally and quantitatively, that a creep life predictive equation, at such various high temperatures, is well derived by the LMP method.