Radiation damage and stage III defect annealing in thermal neutron irradiated tungsten. [Room temperature to 1200/sup 0/C]

Journal Article · Wed Mar 01 00:00:00 EST 1978 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(78)90165-7· OSTI ID:6637926

Kim, Y W; Galligan, J M

The damage and the recovery behavior of defects in thermal neutron irradiated tungsten has been investigated in the temperature range of room temperature to 1200/sup 0/C, using electrical resistivity measurements and field ion microscope observations. Extensive observations of the isochronal annealing of the irradiated specimens of various purity show that the defects, introduced by irradiation, are completely recovered at around 420/sup 0/C after stage III recovery for the least pure specimens of approximately 200 atm ppM impurity, while in the purest specimens of approximately 1 atm ppM impurity an additional recovery stage (stage IV) is present. Field ion microscope observations show that the motion of interstitials is the dominant process in stage III recovery, whose activation energy, determined by resistivity measurements, varies between 1.68 +- 0.05 and 1.71 +- 0.05 eV, depending upon the purity of the material. The occurrence of stage IV in the purest specimens is explained in terms of the clustering of mobile defects which takes place during stage III recovery.

• Research Organization: Univ. of Connecticut, Storrs
• OSTI ID: 6637926
• Journal Information: Acta Metall.; (United States), Vol. 26:3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
TUNGSTEN
PHYSICAL RADIATION EFFECTS
ACTIVATION ENERGY
ANNEALING
CRYSTAL STRUCTURE
DAMAGE
DEFECTS
INTERSTITIALS
TEMPERATURE DEPENDENCE
THERMAL NEUTRONS
VACANCIES
VERY HIGH TEMPERATURE
BARYONS
CRYSTAL DEFECTS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY
FERMIONS
HADRONS
HEAT TREATMENTS
METALS
NEUTRONS
NUCLEONS
POINT DEFECTS
RADIATION EFFECTS
REFRACTORY METALS
TRANSITION ELEMENTS
360106* - Metals & Alloys- Radiation Effects