Author: C. E. Coleman
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Deformation parameters of neutron irradiated zircaloy-4 at 300 degrees celsius
Author: C. E. Coleman
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Nuclear Science Abstracts
Author:
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ISBN:
Category : Nuclear energy
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages :
Book Description
Modeling of Localized Deformation in Neutron Irradiated Zircaloy-2
Author: RB. Adamson
Publisher:
ISBN:
Category : Crack initiation
Languages : en
Pages : 17
Book Description
The onset of plastic instability in irradiated materials is known to be governed by deformation processes that occur on a microscopic scale. In order to identify the nature of the controlling mechanisms giving rise to plastic instability, details of the deformation processes were examined for Zircaloy-2 irradiated to fluences of 1.0 to 3.0 x 1021 neutrons (n)/cm2 (E >1 MeV) and tested in inert and 0.3-torr iodine atmospheres at 322 ~ 335°C. For irradiated materials tested in air, it was shown that plastic strain at the maximum load decreased by more than an order of magnitude relative to unirradiated material, especially under plane-stress conditions. This was due largely to concentrated shear deformation resulting from dislocation channel development. When the similar materials were tested in iodine, the load-carrying capacity was reduced further. Based on the evidence obtained by metallographic examination, a model has been proposed describing deformation behavior of irradiated plane-stress specimens by assuming consecutive formation and strain hardening of new deformation zones containing channels. Crack nucleation under an iodine atmosphere is believed to occur when the local strain at the channel zone becomes sufficiently large to break oxide films and cause intergranular cracking.
Publisher:
ISBN:
Category : Crack initiation
Languages : en
Pages : 17
Book Description
The onset of plastic instability in irradiated materials is known to be governed by deformation processes that occur on a microscopic scale. In order to identify the nature of the controlling mechanisms giving rise to plastic instability, details of the deformation processes were examined for Zircaloy-2 irradiated to fluences of 1.0 to 3.0 x 1021 neutrons (n)/cm2 (E >1 MeV) and tested in inert and 0.3-torr iodine atmospheres at 322 ~ 335°C. For irradiated materials tested in air, it was shown that plastic strain at the maximum load decreased by more than an order of magnitude relative to unirradiated material, especially under plane-stress conditions. This was due largely to concentrated shear deformation resulting from dislocation channel development. When the similar materials were tested in iodine, the load-carrying capacity was reduced further. Based on the evidence obtained by metallographic examination, a model has been proposed describing deformation behavior of irradiated plane-stress specimens by assuming consecutive formation and strain hardening of new deformation zones containing channels. Crack nucleation under an iodine atmosphere is believed to occur when the local strain at the channel zone becomes sufficiently large to break oxide films and cause intergranular cracking.
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1502
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1502
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Metals Abstracts
Author:
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ISBN:
Category : Metallurgy
Languages : en
Pages : 812
Book Description
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 812
Book Description
Effects of Cold Work and Neutron Irradiation on the Tensile Properties of Zircaloy-2
Author: Arden Lee Bement (Jr.)
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 214
Book Description
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 214
Book Description
Influence of Neutron Irradiation on the Creep of Zircaloy-2 At 300 Degrees Celsius
Author: Atomic Energy of Canada Limited
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
Effects of Cold Work and Neutron Irradiation on the Tensile Properties of Zircaloy-2
Author: A. L. Bement
Publisher:
ISBN:
Category : Zirconium-tin alloys
Languages : en
Pages : 416
Book Description
Publisher:
ISBN:
Category : Zirconium-tin alloys
Languages : en
Pages : 416
Book Description
The Effect of Neutron Irradiation and Cold Work on the Strain-Aging Behavior of Zircaloy-2
Author: W. B. Rotsey
Publisher:
ISBN:
Category : Cold working
Languages : en
Pages : 16
Book Description
The strain-aging behavior of annealed Zircaloy-2 in vacuum was studied as a function of deformation temperature, integrated fast-neutron dose, and degree of cold work. Strain aging occurred in the temperature range 200 to 500 C. Transmission electron microscopy showed that in the temperature range 300 to 450 C, dislocations were arranged in a cell structure, and that at 500 C two-dimensional hexagonal dislocation nets were present. Between 200 and 400 C, the strain aging was found to be due to the presence of oxygen; however, the origin of the strain aging between 400 and 500 C was not identified.
Publisher:
ISBN:
Category : Cold working
Languages : en
Pages : 16
Book Description
The strain-aging behavior of annealed Zircaloy-2 in vacuum was studied as a function of deformation temperature, integrated fast-neutron dose, and degree of cold work. Strain aging occurred in the temperature range 200 to 500 C. Transmission electron microscopy showed that in the temperature range 300 to 450 C, dislocations were arranged in a cell structure, and that at 500 C two-dimensional hexagonal dislocation nets were present. Between 200 and 400 C, the strain aging was found to be due to the presence of oxygen; however, the origin of the strain aging between 400 and 500 C was not identified.
Transactions of the 4th International Conference on Structural Mechanics in Reactor Technology, San Francisco, California, USA, 15-19 August 1977
Author:
Publisher:
ISBN:
Category : Nuclear reactors
Languages : en
Pages : 954
Book Description
Publisher:
ISBN:
Category : Nuclear reactors
Languages : en
Pages : 954
Book Description