Microstructural evolution of martensitic steels during fast neutron iradiation
- Oak Ridge National Lab., TN (USA)
Irradiation of martensitic/ferritic steels with fast neutrons (E > 0.1 MeV) to displacement damage levels of 30--50 dpa at temperatures of 300--500{degree}C produces significant changes in the as-tempered microstructure. Dislocation loops and networks can be produced, irradiation-induced precipitates can form, the lath/subgrain boundary structure and the thermal precipitates produced during tempering can become unstable, and if helium is present, bubbles and voids can form. These microstructural changes caused by irradiation can have important effects on the properties of this class of steels for both fast breeder reactor (FBR) and magnetic fusion reactor (MFR) applications. The purpose of this paper is to compare reactor-irradiated and long-term thermally aged 9Cr--1MoVNb specimens, in order to distinguish effects due to displacement damage from those caused by elevated-temperature exposure alone. 7 refs., 1 fig.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5587854
- Report Number(s):
- CONF-891103-24; ON: DE89016231
- Country of Publication:
- United States
- Language:
- English
Similar Records
Comparison of the effects of long-term thermal aging and HFIR irradiation on the microstructural evolution of 9Cr-1MoVNb steel
Postirradiation tensile behavior of nickel-doped ferritic steels
Related Subjects
360106 -- Metals & Alloys-- Radiation Effects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
ALLOYS
CARBON ADDITIONS
CRYSTAL STRUCTURE
DAMAGING NEUTRON FLUENCE
DISPLACEMENT RATES
FERRITIC STEELS
IRON ALLOYS
IRON BASE ALLOYS
MARTENSITE
MICROSTRUCTURE
NEUTRON FLUENCE
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
STEELS