Title :
Development of New Ferritic/Martensitic Steels for Fusion Applications
Author :
Klueh, R.L. ; Hashimoto, N. ; Maziasz, P.J.
Author_Institution :
Oak Ridge Nat. Lab., TN
Abstract :
Martensitic steels are considered for structural applications for fusion power plants, but they are limited by strength to operating temperatures below 550-600degC. For increased plant efficiency, steels for >650degC service are sought. Based on the science of precipitate strengthening, a thermomechanical treatment (TMT) was developed that respectively increased strength at 700degC of commercial nitrogen-containing steels and new steels designed for the TMT to 80 and 200% greater than for commercial steels with a conventional heat treatment. Precipitates in the steels after the TMT were up to eight-times smaller at a number density four orders of magnitude greater
Keywords :
fusion reactor materials; martensitic steel; nuclear power stations; precipitation hardening; thermomechanical treatment; 700 C; commercial nitrogen-containing steels; conventional heat treatment; ferritic steels; fusion power plants; martensitic steels; operating temperatures; plant efficiency; precipitate strengthening; structural applications; thermomechanical treatment; Annealing; Chromium; Grain boundaries; Laboratories; Matrix converters; Power generation; Steel; Temperature; Thermomechanical processes; Transmission electron microscopy; martensitic steels; precipitatate strengthening; structural steels;
Conference_Titel :
Fusion Engineering 2005, Twenty-First IEEE/NPS Symposium on
Conference_Location :
Knoxville, TN
Print_ISBN :
0-4244-0150-X
Electronic_ISBN :
0-4244-0150-X
DOI :
10.1109/FUSION.2005.252908
