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

fYear

2005

fDate

Sept. 2005

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/FUSION.2005.252908

Filename

4018942