TEM study of neutron-irradiated iron
Results of a transmission electron microscopy study of the defect structure in iron neutron-irradiated to low fluences (less than or equal to 1 dpa) at temperatures of 455 to 1013/sup 0/K are presented. The dislocation microstructures coarsen with increasing irradiation temperature from decorated dislocations, through clusters of dislocation loops, to near-edge, interstitial dislocation loops with b = a<100>, and network segments. Significant cavity formation occurred only at 548 to 723/sup 0/K, with homogeneous distributions found only at 623 and 673/sup 0/K. The maximum swelling of 0.07% occurred at 673/sup 0/K. Large cavities had a truncated octahedral shape with (111) facets and (100) truncations. Damage halos were observed around boron-containing precipitates. The effects of interstitial impurities on microstructural development and the differences in the observed microstructures compared to those in refractory bcc metals are discussed. 8 figures, 6 tables.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6659613
- Report Number(s):
- CONF-811145-13; ON: DE83003503
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DATA
DISLOCATIONS
ELECTRON MICROSCOPY
ELEMENTS
EXPERIMENTAL DATA
HIGH TEMPERATURE
INFORMATION
INTERSTITIALS
IRON
LINE DEFECTS
METALS
MICROSCOPY
MICROSTRUCTURE
NUMERICAL DATA
PHYSICAL RADIATION EFFECTS
POINT DEFECTS
RADIATION EFFECTS
SWELLING
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
TRANSMISSION ELECTRON MICROSCOPY
VERY HIGH TEMPERATURE
360106* -- Metals & Alloys-- Radiation Effects
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DATA
DISLOCATIONS
ELECTRON MICROSCOPY
ELEMENTS
EXPERIMENTAL DATA
HIGH TEMPERATURE
INFORMATION
INTERSTITIALS
IRON
LINE DEFECTS
METALS
MICROSCOPY
MICROSTRUCTURE
NUMERICAL DATA
PHYSICAL RADIATION EFFECTS
POINT DEFECTS
RADIATION EFFECTS
SWELLING
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
TRANSMISSION ELECTRON MICROSCOPY
VERY HIGH TEMPERATURE