New Nano-Particle-Strengthened Ferritic/Martensitic Steels By Conventional Thermomechanical Treatment
- ORNL
For increased fusion power plant efficiency, steels for operation at 650 C and higher are sought. Based on the science of precipitate strengthening, a thermo-mechanical treatment (TMT) was developed that increased the strength from room temperature to 700 C of commercial nitrogen-containing steels and new steels designed for the TMT. At 700 C increases in yield stress of 80 and 200% were observed for a commercial steel and a new steel, respectively, compared to commercial normalized-and-tempered steels. Creep-rupture strength was similarly improved. Depending on the TMT, precipitates were up to eight-times smaller at a number density four orders of magnitude greater than those in a conventionally heat treated steel of similar composition.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Metals-Processing Laboratory Users Facility
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 1000293
- Journal Information:
- Journal of Nuclear Materials, Vol. 367-370, Issue 1; ISSN 0022-3115
- Country of Publication:
- United States
- Language:
- English
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