A study on mechanical properties of ferritic alloy by physical testing for nuclear power fusion reactors

Abstract

The ferrite plays an important role in key component materials for nuclear power plant. The study was performed on ferritic alloys with various Cr content ranging from 10 to 38wt%. The Vickers-hardness and mechanical test results indicate that the high Cr content will cause a hardening and strengthening effect on the ferrite steel. Meanwhile, it can be concluded that the ferritic alloy suffers a reduction of toughness and a failure mode transition from ductile to brittle fracture with the increasing Cr content from the SEM fractography analysis.

Study on the influence of thermal aging on the mechanical and magnetic properties of ferritic steel

“…Despite the difference in grain size, the ferrite phase has been verified through X-ray diffraction analysis and FERITSCOPE FMP30 from Helmut Fischer GmbH. More details about the preparation and microstructure of the material in the virgin state have been reported in previous studies [8]. The alloys are exposed to prolonged thermal aging at 400℃ for different times.…”

“…Therefore, four ferritic Fe-Cr binary alloys with different Cr contents of 9.78 wt.%, 18.85 wt.%, 25.45 wt.%, and 37.61 wt.% were prepared by vacuum induction melting method, which is nominated as Fe-10Cr, Fe-19Cr, Fe-25Cr, and Fe-38Cr respectively. More details about the chemical composition are reported in previous studies [8].…”