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Category :
Languages : en
Pages :
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STRESS-CRACKING IN THE URANIUM-10 W
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Category :
Languages : en
Pages :
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Category :
Languages : en
Pages :
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Stress-Cracking in the Uranium-10 W/o Molybdenum Alloy
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Languages : en
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The Properties of a Metastable Gamma-phase Uranium-base Alloy : U-7.5 Nb-2.5 Zr
Author: C. A. W. Peterson
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Category :
Languages : en
Pages : 44
Book Description
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Category :
Languages : en
Pages : 44
Book Description
Reactor Materials
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Category : Nuclear reactors
Languages : en
Pages : 288
Book Description
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Category : Nuclear reactors
Languages : en
Pages : 288
Book Description
Reactor Core Materials
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Category : Nuclear fuels
Languages : en
Pages : 244
Book Description
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Category : Nuclear fuels
Languages : en
Pages : 244
Book Description
STRESS CORROSION CRACKING IN URANIUM-MOLYBDENUM ALLOYS.
Author:
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Languages : en
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An investigation was conducted to determine the cause of cracking, during tension, on the surface of tensile specimens of U--Mo alloys. The cracking was observed in alloys that were water quenched from a temperature range in which the body-centered cubic gamma phase was stable and, subsequently, stressed in tension. The investigation was carried out on alloys of U--Mo containing 5 and 4 wt% Mo. It was discovered early in the study that the cracking could be eliminated by testing tensile specimens in a He atmosphere. Because of this result, tensile tests were performed in vacuum O22, impure N2, and purified N2. Additional experiments were done to establish the relation of stress state, temperature, strain rate, O2 pressure, stress magnitude, and grain size to the cracking phenomenon. U--4 wt% Mo and U--5 wt% Mo were compared with respect to microstructure and crystal structure, since both alloys cracked during the tensile test. The origin and propagation of cracks in the microstructure were studied, using motion pictures and metallography. The results of the various experiments showed that the cracking occurred only in tension and was caused by stress-corrosion cracking due to the presence of O/sub 2/ in the atmosphere. The rate of cracking increased as the temperature was increased above 25 deg C. Below 10 deg C cracking was not observed in the U-5 wt% Mo alloy. Cracking was not associated with just one metastable phase. since it was observed in both the U-5 wt% Mo and U-4 wt% Mo alloys, which have different crystal structures when rendered metastable by water quenching from the gamma phase field. The path of fracture was transgranular and was not associated with deformation markings in the grains. (auth).
Publisher:
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Category :
Languages : en
Pages :
Book Description
An investigation was conducted to determine the cause of cracking, during tension, on the surface of tensile specimens of U--Mo alloys. The cracking was observed in alloys that were water quenched from a temperature range in which the body-centered cubic gamma phase was stable and, subsequently, stressed in tension. The investigation was carried out on alloys of U--Mo containing 5 and 4 wt% Mo. It was discovered early in the study that the cracking could be eliminated by testing tensile specimens in a He atmosphere. Because of this result, tensile tests were performed in vacuum O22, impure N2, and purified N2. Additional experiments were done to establish the relation of stress state, temperature, strain rate, O2 pressure, stress magnitude, and grain size to the cracking phenomenon. U--4 wt% Mo and U--5 wt% Mo were compared with respect to microstructure and crystal structure, since both alloys cracked during the tensile test. The origin and propagation of cracks in the microstructure were studied, using motion pictures and metallography. The results of the various experiments showed that the cracking occurred only in tension and was caused by stress-corrosion cracking due to the presence of O/sub 2/ in the atmosphere. The rate of cracking increased as the temperature was increased above 25 deg C. Below 10 deg C cracking was not observed in the U-5 wt% Mo alloy. Cracking was not associated with just one metastable phase. since it was observed in both the U-5 wt% Mo and U-4 wt% Mo alloys, which have different crystal structures when rendered metastable by water quenching from the gamma phase field. The path of fracture was transgranular and was not associated with deformation markings in the grains. (auth).
Government-wide Index to Federal Research & Development Reports
Author:
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Category : Government publications
Languages : en
Pages : 1654
Book Description
Publisher:
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Category : Government publications
Languages : en
Pages : 1654
Book Description
Nuclear Science Abstracts
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Category : Nuclear energy
Languages : en
Pages : 1070
Book Description
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Category : Nuclear energy
Languages : en
Pages : 1070
Book Description
Catalog of Technical Reports
Author: United States. Dept. of Commerce. Office of Technical Services
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Category :
Languages : en
Pages : 600
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Publisher:
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Category :
Languages : en
Pages : 600
Book Description
Scientific and Technical Aerospace Reports
Author:
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Category : Aeronautics
Languages : en
Pages : 220
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 220
Book Description