Microstructural changes in neutron-irradiated commercial alloys: a sequel

Conference · Fri Jan 01 04:00:00 EST 1982 · Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)

OSTI ID:5709825

Bell, W L ^[1]; Lauritzen, T

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1. General Electric Co., Pleasanton, CA

The effect of reactor irradiation on the microstructural stabilities of several high-nickel-content superalloys was evaluated by transmission electron microscopy. The alloys include Nimonic PE16 and the Inconel alloys 706 and 718. Specimens were irradiated in sealed, unstressed, sodium-filled capsules in the EBR-2. Irradiation temperatures ranged from 399 to 649/sup 0/C (750 to 1200/sup 0/F); specimens accumulated a peak fluence of 6 x 10/sup 22/ n/cm/sup 2/, E > 0.1 MeV. While little or no microstructural changes were observed in Nimonic PE16, the Inconels exhibited overaging precipitation effects - in particular, the formation of the stable overaging precipitate, eta - which increased with temperature in the range studied. Inconel 706 exhibited the more pronounced overaging effects, i.e., larger and coarser eta plates, consistent with its higher Ti/Al ratio. In general, the precipitation features noted in all three alloys were similar to those observed in identical material after ion bombardment with high energy nickel. The ion bombardment work has thus correctly predicted the microstructural response of these alloys to fast neutron irradiation.

• OSTI ID: 5709825
• Report Number(s): CONF-820628-
• Conference Information: Journal Name: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States) Journal Volume: 782
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
BARYONS
BORON ADDITIONS
BORON ALLOYS
BREEDER REACTORS
CARBON ADDITIONS
CHROMIUM ALLOYS
CRYSTAL STRUCTURE
EBR-2 REACTOR
ELECTRON MICROSCOPY
ELEMENTARY PARTICLES
EPITHERMAL REACTORS
EXPERIMENTAL REACTORS
FAST NEUTRONS
FAST REACTORS
FBR TYPE REACTORS
FERMIONS
HADRONS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCONEL 706
INCONEL 718
INCONEL ALLOYS
IRON ALLOYS
LIQUID METAL COOLED REACTORS
LMFBR TYPE REACTORS
MATERIALS
MICROSCOPY
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NEUTRONS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIMONIC
NIMONIC PE16
NIOBIUM ALLOYS
NUCLEONS
PHYSICAL RADIATION EFFECTS
POWER REACTORS
RADIATION EFFECTS
REACTORS
RESEARCH AND TEST REACTORS
SODIUM COOLED REACTORS
TITANIUM ALLOYS
TRANSMISSION ELECTRON MICROSCOPY
ZIRCONIUM ADDITIONS
ZIRCONIUM ALLOYS