New Nano-Particle-Strengthened Ferritic/Martensitic Steels By Conventional Thermomechanical Treatment

Journal Article · Sun Dec 31 23:00:00 EST 2006 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2007.03.001· OSTI ID:1000293

Klueh, Ronald L ^[1]; Hashimoto, Naoyuki ^[1]; Maziasz, Philip J ^[1]

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1. 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 Laboratory (ORNL); Metals-Processing Laboratory Users Facility
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1000293
• Journal Information: Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Journal Issue: 1 Vol. 367-370; ISSN 0022-3115
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
77 NANOSCIENCE AND NANOTECHNOLOGY
AUSTENITIC STEELS
CREEP
FERRITIC STEELS
FRACTURE PROPERTIES
NANOSTRUCTURES
PRECIPITATION HARDENING
THERMOMECHANICAL TREATMENTS
THERMONUCLEAR REACTOR MATERIALS
YIELD STRENGTH