Evaluation on Creep Properties of Reduced Activation Ferritic Steel(RAFs) for Nuclear Fusion Reactor

J. Ocean Eng. Technol. 2004;18(2):58-63.

핵융합로용 저방사화 철강재료(RAFs)의 크리프 특성평가

공유식,윤한기,남승훈

부경대학교 기계공학부,동의대학교 기계공학,한국표준과학연구원

Keywords: Reduced Activation Ferritic Steel, RAFs, Creep Life Prediction, Larson-Miller parameter LMP, Creep Properties, Ruphne Time

핵심용어: 저방사화 철강재, 크리프 수명예측, 라손-밀러 파라미터, 크리프 특성, 파단시간

Abstract

Reduced Activation Ferritic/Martensitic Steels (RAFs) are leading candidntes for structural materials of a D-T fusion reactor. One of the RAFs, JLF-l (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-Miler parameter method for JLF-l to be used for fusion reactor materials or other high temperature components, are presented at the elevated temperatures of 50$0^{circ}C$, 55$0^{circ}C$, $600^{circ}C$, $650^{circ}C$ and 704$^{circ}C$. It was confirmed, experimentally and quantitatively, that a creep life predictive equation, at such various high temperatures, is well derived mr the LMP method.