Results 241 to 250 of about 5,873 (297)

Irradiation hardening in columbium

Acta Metallurgica, 1963
Abstract The influence of neutron irradiation on strength and ductility of columbium has been studied as a function of grain size and irradiation temperature (77°–330°C). Irradiation-induced hardening has been analyzed in terms of σi, the frictional stress opposing the motion of dislocation, and the constant ky as determined from both a Petch-type ...
P.R.V. Evans, A.F. Weinberg, R.J. van Thyne   +2 more
openaire   +1 more source

Embrittlement of irradiated F82H in the absence of irradiation hardening

Journal of Nuclear Materials, 2009
Abstract Neutron irradiation of 7–12% Cr ferritic/martensitic steels below 425–450 °C produces microstructural defects and precipitation that cause an increase in yield stress. This irradiation hardening causes embrittlement, which is observed in a Charpy impact or fracture toughness test as an increase in the ductile-brittle transition temperature ...
R.L. Klueh, K. Shiba, M.A. Sokolov
openaire   +1 more source

Irradiation hardening in F82H irradiated at 573K in the HFIR

Journal of Nuclear Materials, 2011
Post-irradiation tensile tests were conducted on alloy F82H and variants of this steels irradiated at 573 K up to 19 dpa in the High Flux Isotope Reactor (HFIR) in Oak Ridge National Laboratory. Post-irradiation tensile and hardness tests revealed that the strength of F82H steeply increased below 5 dpa, and the total elongation decreased. The ductility
T. Hirose, N. Okubo, H. Tanigawa, M. Ando, M.A. Sokolov, R.E. Stoller, G.R. Odette   +6 more
openaire   +1 more source

Irradiation hardening in copper and nickel

Acta Metallurgica, 1960
Abstract The lattice and dislocation components of irradiation hardening have been measured in polycrystalline copper and nickel as a function of 1. (a) testing temperature and 2. (b) neutron dose. The results are compared with Seeger's theory of lattice hardening, which is based on dislocations cutting through a forest of obstacles under ...
M.J. Makin, F.J. Minter
openaire   +1 more source

The hardening of copper by neutron irradiation

Philosophical Magazine, 1959
Copper wires of 0.060 in. diameter were irradiated at 50 deg C for 1 to 3 weeks. At a fixed neutron dose and testing temperature the yield stress of irradiated polycrystalline copper increases within accuracy limits of experimental measurements. Lattice friction hardening and source hardening proceed simultaneously.
M. A. Adams, P. R. B. Higgins
openaire   +1 more source

Electron irradiation hardening of aluminum

Acta Metallurgica, 1964
Abstract A study has been made of the effects of electron irradiation at 77°K on the yield stress of Al. For integrated fluxes up to 1.35 × 1018 electrons/cm2, the increase in yield stress, Δτ, has been found to exhibit a 1 2 - power dependence on the defect concentration. The increase in yield stress which is incurred upon irradiation at 77°
D Keefer, A Sosin
openaire   +1 more source

Precipitation and irradiation hardening in iron

Philosophical Magazine, 1961
Abstract Precipitation of carbon from α-iron during irradiation and thermal ageing has been studied using thin film electron transmission microscopy. During irradiation at 100°c precipitates formed with a density of 2 × 1014 cm−3 and saturated at 400 A diameter after 72 hours in a flux of 1·5 × 1011 neutron cm−3 sec−1 > 1 MeV.
D. Hull, I. L. Mogford
openaire   +1 more source

A Model of "Lattice" Hardening in Irradiated Copper Crystals with the External Characteristics of "Source" Hardening

physica status solidi (b), 1965
AbstractA model is proposed to explain the formation of slip lines in irradiated copper crystals during the propagation of the Lüders front. In this model it is shown that, due to the sweeping up of the irradiation produced defect clusters by deformation, the critical stress to produce a slip line is that required to operate the source in producing the
M. J. Makin, J. V. Sharp
openaire   +1 more source