Hardening stages in niobium irradiated with 14 MeV neutrons and 16 MeV protons

Journal Article · Thu Jul 01 04:00:00 EDT 1982 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(82)90162-6· OSTI ID:5946026

Jones, R H; Bradley, E R; Styris, D L

Two distinct hardening stages were observed in niobium irradiated at 25/sup 0/C to 10/sup 18/cm/sup -2/ with Be(d,n) neutrons and 16 MeV protons. The low fluence stage persisted to a fluence of 5 x 10/sup 17/ cm/sup -2/ and was attributed to impurity atom-point defect complexes. The higher fluence stage had a square root fluence dependence which attributed to point defect clusters with a barrier strength, ..beta.., of 4-7 for both 14 MeV neutron and 16 MeV proton irradiated niobium. Protons induced 1.6 times more hardening than Be(d,n) neutrons in the low fluence hardening stage.

• Research Organization: Pacific Northwest Laboratory, Richland, WA 99352
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 5946026
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 30:7; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ALKALINE EARTH METALS
BARYONS
BERYLLIUM
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FERMIONS
HADRONS
HARDENING
IMPURITIES
IRRADIATION
MEDIUM TEMPERATURE
METALS
MEV RANGE
MEV RANGE 10-100
NEUTRONS
NIOBIUM
NUCLEONS
PHYSICAL RADIATION EFFECTS
POINT DEFECTS
PROTONS
RADIATION EFFECTS
RADIATION HARDENING
TRANSITION ELEMENTS