|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials and Fuels for the Current and Advanced Nuclear Reactors VII
||Metallurgical Analysis of Ti Addition with Ta in Reduced Activation Ferritic-martensitic Steel
||HanKyu Kim, Ji-Won Lee, Joon-Oh Moon, Chang-Hoon Lee, Hyun-Uk Hong
|On-Site Speaker (Planned)
Reduced activation ferritic-martensitic (RAFM) steels are considered as structural materials for blanket modules of nuclear fusion reactors because of their good balance of properties, low activation and durability. As part of the research framework to improve the RAFM steels suitable for higher temperatures, the effects of Ti and Ta addition on microstructure stability and mechanical properties have been investigated. Addition of Ti to Eurofer97 steel to promote the precipitation of (Ti,W)C with high resistance to coarsening. The Ti-added RAFM steel (336 MPa) exhibited higher yield strength while maintaining good ductility up to 600 ˚C as compared with Eurofer97 (304 MPa). However, Ti-RAFM (336→273 MPa) was more susceptible to degradation after thermal exposure than Eurofer97 (304→284 MPa). In order to reduce the diffusion rate at hight temperature, Ta atom is therefore added to Ti-RAFM (Ta/Ti RAFM). This Ta/Ti RAFM steel exhibited a good balance of properties with outstanding microstructure stability.
||Planned: Supplemental Proceedings volume