Low Activation Ferritic/Martensitic Steel, Potential Core Structure Material of Supercritical Water Cooled Reactor
The mechanical properties of RAF/M steels, such as DBTT, creep and low cycle fatigue, are investigated in this paper. Due to loss of strain hardening, the reduction in design margin significantly and microstructure instability during LCF tests at high temperature, this JLF-lsteel, as well as RAF/M, is not suitable to be applied to cladding if cyclic plastic deformation is considered, but maybe used as a candidate material for core structure for SCWRs. The phenomenon of cyclic softening of RAF/M steels is a critical issue for design. The lower cyclic stress limit curve is a base for design and safety analysis. The design rules derived from the mechanical properties of the materials in its initial tempered martensitic condition should be reconsidered, especially at high temperature.
RAF/M steels SCWRs design margin cyclic softening lower cyclic stress limit curve
Huailin LI Wen YANG Qifa YANG
China Institute of Atomic Energy, Beijing 102413, China
国际会议
上海
英文
327-336
2007-03-12（万方平台首次上网日期，不代表论文的发表时间）