Comparison of damage microstructures in neutron-irradiated vanadium and iron
Journal Article
·
· Proc. - Annu. Meet., Electron Microsc. Soc. Am.; (United States)
OSTI ID:6121776
It is known that bcc ferritic materials are more resistant to radiation-induced cavitational swelling than are other bcc materials. Furthermore, a recent study of neutron-irradiated iron reported several unusual features of the radiation-induced microstructures. One of these was the observation that the cavity morphology, a truncated octahedron with (111) faces and (100) truncations, was the shape commonly observed in fcc materials. The morphologies commonly observed in bcc materials include truncated dodecahedrons with (110) faces and (100) truncations and cubes with (100) faces. The cavity morphology and dislocation loop geometry in bcc vanadium were compared with the previously reported observations for neutron-irradiated iron. The specimens were vanadium (V) with 100 wppm of interstitial impurities and vanadium with boron carbide additions (V-B/sub 4/C) which were irradiated to approx.1 dpa in the same Oak Ridge Research Reactor capsule as the iron specimens. The irradiation temperatures were 623-773 K for the V specimens and 723-923 K for the V-B/sub 4/C specimens. Microstructural examinations were performed in JEM 120CX and Philips EM 400T/FEG transmission electron microscopes. Cavities were observed in all specimens.
- Research Organization:
- Oak Ridge National Lab., TN
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6121776
- Journal Information:
- Proc. - Annu. Meet., Electron Microsc. Soc. Am.; (United States), Journal Name: Proc. - Annu. Meet., Electron Microsc. Soc. Am.; (United States) Vol. 41; ISSN EMSPA
- Country of Publication:
- United States
- Language:
- English
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