Brittle–ductile transitions in vanadium and iron–chromium

We report ongoing experimental work on fracture and brittle–ductile transitions in vanadium, iron and iron–9% chromium single crystals and polycrystals. Tests were carried out by four-point bending of pre-cracked specimens in the temperature range 77–300 K, at a variety of strain rates. For a given...

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Bibliographic Details
Published inJournal of nuclear materials Vol. 367; pp. 637 - 643
Main Authors Joseph, T.D., Tanaka, M., Wilkinson, A.J., Roberts, S.G.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Amsterdam Elsevier B.V 01.08.2007
Elsevier
Subjects
Applied sciences
Controled nuclear fusion plants
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fission nuclear power plants
Fuels
Installations for energy generation and conversion: thermal and electrical energy
Nuclear fuels
Ductile brittle transition
Vanadium
Chromium
Iron
Ductile fracture
Activation energy
Crack
Nuclear reactor
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Summary:We report ongoing experimental work on fracture and brittle–ductile transitions in vanadium, iron and iron–9% chromium single crystals and polycrystals. Tests were carried out by four-point bending of pre-cracked specimens in the temperature range 77–300 K, at a variety of strain rates. For a given material, variation of the brittle–ductile transition temperature with strain rate allows us to estimate an activation energy for the controlling process; for vanadium this was found to be ∼0.37 eV, for iron ∼0.21 eV and for iron–9% chromium ∼0.11 eV.
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ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2007.03.077