Mechanical properties of F82H plates with different thicknesses

Sakasegawa, Hideo   ; Tanigawa, Hiroyasu

Fusion DEMO reactor requires over 11,000 tons of reduced activation ferritic/martensitic steel and it is important to develop the manufacturing technology for producing large-scale components of DEMO blanket with appropriate mechanical properties. In this work, we studied mechanical properties of ferritic/martensitic steel F82H plates with different thicknesses. This is because mechanical properties are generally degraded with increasing production volume and size. As the result, their homogeneity and anisotropy were not significant. However, mass effect was found in their Charpy impact property with increasing plate thickness, i.e. the ductile brittle transition temperature (DBTT) of a 100 mm thick plate was higher than those of the other plates, but its DBTT was still lower than 0C and comparable to the former heats.