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URANIUM ALLOY NEWSLETTER

Description: Argonne National Lab. Annealing experiments of highpurity C --U alloys in the gamma region in an Ar atmosphere show that the metal is subject to decarbinization. Fourteen binary U--Pd alloys were prepared and examined. Pd solubility in gamma U is less than 1 wt.% at 890 deg C. Seventeen binary alloys of U-Ru were prepared and examined in the as-cast condition. The corrosion resistance after irradiation of U--Si alloys was tested. Homogeneous U- -Ta alloys have not been obtained. Th-rich U alloys were found to be more stable under irradiation than the best U alloys. The effect of heat treatment on microstructure is being studied as part of the effort to understand the effect of alloying on corrosion resistance in Ti--U alloys. Crystal and corrosion studies on U--Zr alloys are reported. Armour Research Foundation. Small ternary additions were found to greatly affect the transformation characteristics of U-- Nb alloys, and a hardness change was noted for this alloy. Preliminary data for U--Nb--Zr alloy demonstrated a relationship between the strained matrix and the physical properties of the alloy. Battelle Memorial Institute. Phase relationships between the intermediate delta phases of the U--Mo and U--Ti systems were conducted. U--Zr, U--Mo, and U--Nb alloys were evaluated for use as high-temperature reactor fuels. The kinetics of the betato-epsilon decomposition of Zr--U alloys are being investigated. The mechanism of aqueous U corrosion is being studied. Mallinckrodt Chemical Works. In the production of Nb--U alloy by co-reduction there was an indication of insufficient heat. Thermal boosters and a redesigned bomb for improving heat conservation will be investigated. National Bureau of Standards. Experimental work on the U-- Pt system is completed. Thermal analyses on U--Pd alloys did not show the U transformations present. Metallographic examination revealed an apparently singlephase structure. Thermal analysis data were collected for U--Ru and ...
Date: November 1, 1956
Creator: Epremian, E. ed.
Partner: UNT Libraries Government Documents Department

URANIUM ALLOY NEWSLETTER NO. 14

Description: Ames Lab. Studies of Nb--U alloys, phase studies of the U----Z--system and the solubility of U in Zn, are summarized. Argonne National Lab. Phase studies of C -- U systems and Nb--U alloys, the effects of radiation on Mo--U alloys, corrosion and irradiatron of Sr--U systems and Nb--U--Zr alloys are reported. Battelle Memorial lnst. The stabrlit.v and existence range of the intermediate epsilon phase, heat treatment, and radiation damage of U--Zr alloys were investigated. A study of the physrcal properties of Mo--U alloys, U alloys for slug-type fuel elements, low-melting U alloys for reactor fuels is presented. The preparation of Al--U alloys is outlined, and corrosion studies of U--Zr alloys were made. Hanford Atomic Products Operation. A series of experiments covering the testing of irradiated U alloys and the transformation kinetics of Si- -U systems were initiated. Knolls Atomic Power Lab. Irradiation stability and the equilibrium phase diagram of U--Zr alloys, and fission gas diffusion in Al--U alloys are being investigated. National Bureau of Standards. A brief summary of the work on Pt--U alloys is given. Nuclear Metals, Inc. Cladding of unalloyed U with either Zr or zircaloy by coextrusion and the preparation of Si--U systems were reported. Sylvania Electric Products, Inc. The preparation of enriched Mo-- U alloys, investigation of the fabrication of epsilonized Si--U system by powder metallurgy and corrosron rates in 600 deg F water are being studied. Westinghouse Atomic Power Division. Study of powder films of diffusion areas in Zr clad-U/sub 3/Si, preparation of fuel elements by brazing extruded reds of Si-- U inside zircaloy tubes, mechanism of corrosion of ueclad U/sub 3/ Si, radiation of Mo--U alloys, and Mo--U phase diagrams are reported. Atomics International (NAA). Results of thermal cycling as cast U alloy slugs are presented. (J.E.D.)
Date: March 1, 1956
Creator: Epremian, E. ed.
Partner: UNT Libraries Government Documents Department

URANIUM ALLOY NEWSLETTER NO. 13

Description: Argonne National Lab. Results are summarized from irradiation and corrosion tests on alloys of U--Pu, U--Nb-Sn, and U- Zr-Nb, and U-- Si systems. Armour Research Foundation. Studies of the transformation kinetics of Ubase alloys have been completed, and results are summarized. TTT diagrams are presented for 2 Nb--U alloys. Battelle Memorial Inst. Phase studies, heat treatment studies, and preparation of U-- Zr alloys are described. The study of the properties and preparation of various U alloys for use as fuel elements are continuing. Techniques for melting and casting Al--U alloys and for melting U-- Zr alloys are being developed. Hanford Atomic Products Operation. Results of metallographic and phase studies on U-- Th alloys are reported. The corrosion resistance of several Th--U-- Zr alloys has been studied. National Bureau of Standards. The preparation and phase relations of alloys of U with the platinum metals are being studied. North American Aviation, Inc. The feasibility of fabricating specific U alloys for fuel elements on a semi-production scale is being investigated. Nuclear Metals, Inc. Studies of the thermal properties of U- -Nb--Zr alloys and of the corrosion of U-- Si systems are reported. Fabrication behavior and microstructures in cast, extruded, and heat treated U alloys are being examined. Sylvania Electric Products, Inc. Data are presented on the mechanical properties and dimensional stability under thermal cycling of various powder metallurgy binary U alloys. Corrosion rates in water and densities are reported of some powder metallurgy Si-- U systems. Westinghouse Atomic Power Div. The changes in dimensions, density, electrical resistivity, and hardness of irradiated U--Mo and U--Nb alloys are tabulated. The effects of irradiating prototype fuel rods of U and U--Zr alloy are reported. (W.L.H.)
Date: November 1, 1955
Creator: Epremian, E. ed.
Partner: UNT Libraries Government Documents Department