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Development of Forging Techniques for Uranium

Description: Uranium has been successfully forged using a Lobdell-Nazel forging hammer and a forging temperature range of 500 to 650 degrees centigrade. Using standard forging techniques, the metal readily flowed at the temperature chosen. A noticeable increase in tensile strength, yield strength and percent elongation was obtained in forged metal as compared with cast metal. To obtain complete recrystallization and uniform grain size, a minimum of approximately 75 percent reduction in cross section by forg… more
Date: November 1, 1950
Creator: Anderson, R. E.; Taub, J. M. & Doll, D. T.
Partner: UNT Libraries Government Documents Department
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Fast Neutron Cross Sections: Corrections to LA-1714 and a Correlation of 3 Mev Values

Description: Recent measurements on the long counter efficiency in which comparisons were made with the (n, p) scattering cross section, additional variations in efficiency were found which varied slowly with neutron energy but were still correlated with the total neutron cross section of carbon. Because of these variations in efficiency there are errors in the fission cross sections reported in LA-1714. Corrections to these data have been given here.
Date: March 1, 1957
Creator: Henkel, Richard L.
Partner: UNT Libraries Government Documents Department
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A Determination of the Coefficient of Thermal Expansion of Alpha Plutonium

Description: The coefficient of linear expansion of alpha plutonium has been determined for the range -180 to +100 degree C by the silicon-tube and dial-indicator method. The value of the expansion coefficient is reported as [formula]. Included are a detailed description of the apparatus and a discussion of the method.
Date: March 1, 1952
Creator: Elliott, R. O. & Tate, R. E.
Partner: UNT Libraries Government Documents Department
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The Nickel-Plutonium System

Description: A tentative nickel-plutonium constitutional diagram was based on data obtained by thermal analysis, metallography, and x-ray-diffraction techniques. The systema is a complex one with the following important features. Nickel is soluble in epsilon plutonium, extending the epsilon field to 4.3 at.% nickel at 465 deg C. Nickel and plutonium form six intermetallic compounds, PuNi, EnNi/sub 2/, PuNi/sub 3/, PuNi/sub 4/, PuNi/sub 5/, and PuNi/sub 9/. The compound PuNi/ sub 5/ forms congruently from th… more
Date: March 1, 1951
Creator: Wensch, Glen William, 1917-; Whyte, D D.; Cramer, E M.; Ellinger, F H.; Schonfeld, F W. & Struebing, V O.
Partner: UNT Libraries Government Documents Department
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The Determination of Oxygen in Plutonium by the Capillary Trap Method

Description: A new method for the determination of O/sub 2/ in metals is described. The sample is dropped into molten Pt in a graphite crucible. The oxide in the sample reacts with C to form CO, which is swept out by a stream of argon at atmospheric pressure. The CO is oxidized to CO/sub 2/, which is condensed in a capillary trap and measured with a capillary manometer. The apparatus is sensitive to 0.3 mu g of O/sub 2/, and routine 50-mg Pu samples give a standard deviation of 7 ppm or 0.35 mu g. Pu sample… more
Date: February 1, 1953
Creator: Smiley, William G. (William Gooding), 1915-
Partner: UNT Libraries Government Documents Department
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Exploratory Studies of Hydrazine Formation by Radioactive Ionization

Description: The production yields of hydrazine by various ionization methods are compared. The maximum value of M/N (number of molecules reacting per ion pairs) for electric discharge was 0.25 and for beta particles on liquid ammonia, M/N = 0.31. A 1-Mev reactor could produce 1.6 kg of hydrazine per hour if M/N = 0.04 as determined by alpha particles on liquid ammonia. About 300 ev of energy were needed to form a hydrazine molecule. (C.J.G.)
Date: June 1, 1951
Creator: Busey, Harold M.
Partner: UNT Libraries Government Documents Department
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Remote Control Equipment for Plutonium Metal Production

Description: Design and construction of remote control equipment for plutonium metal production are described. Criteria for the design of the equipment included the following: rubber gloves were to be completely eliminated; all mechanisms were to be built as integral units to facilitate replacement through use of the plastic- bag technique; no accessory equipment such as switches, valves, piping, or cylinders were to be inside the contaminated enclosure unless required to handle the plutonium; and all units… more
Date: October 1, 1951
Creator: Hazen, Wayne C.
Partner: UNT Libraries Government Documents Department
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Some Observations on the Reactivity of Plutonium Dioxide

Description: The index of refraction of PuO2 made by thermal decomposition of PU(C2O2, 6H2O gradually increases from a value < 1.9 to 2.40 as the decomposition temperature is increased from 150 degree to l000 degree C. This change in refractive index parallels a gradual change in the x-ray diffraction pattern from weak, diffuse lines for PuO2 ignited at 150° to sharp, well resolved lines for PuO2 ignited at 1000°C. Similar results are observed for PuO2 made by thermal decomposition of Pu2(C2O4)3*11H2O. The … more
Date: September 1, 1954
Creator: Bjorklund, C.W. & Staritzky, Eugene
Partner: UNT Libraries Government Documents Department
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Forming of Uranium in the Gamma Phase Temperature Range

Description: It has been found relatively easy to form uranium in the gamma phase temperature range by hot pressing, forging, or extrusion. The metal is quite plastic and flows readily to form a shape. Several temperatures from 800 degree C to 1000 degree C were investigated. No forming difficulties were experienced with the metal at the several temperatures concerned. The major difficulty in gamma phase hot pressing or extruding was associated with the tools. Metals or ceramics were not successful as tools… more
Date: May 1, 1951
Creator: Levinson, L. S.; Cribble, W. C.; Taub, J. M. & Doll, D. T.
Partner: UNT Libraries Government Documents Department
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Fusion Welding of Uranium

Description: A technique for the fusion welding of uranium has been under development and several methods of fusion welding have been investigated. The inert gas, shield arc method has proven to be the most satisfactory of the processes thus far examined. Uranium properly weld by this method was free from porosity, cracks, and oxide inclusions. Certain precautions and some special techniques were required to make good welds.
Date: August 1, 1952
Creator: Nelson, V. G.; Taub, J. N. & Dell, D. T.
Partner: UNT Libraries Government Documents Department
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Effect of Annealing Media on the Mechanical Properties of Uranium

Description: The annealing or heat treatment of uranium in any medium other than a good vacuum or purified helium atmosphere, will lower the room temperature properties of ultimate strength, hardness and elongation. In general, the elongation of vacuum annealed uranium exceeds considerably the elongation of air or salt annealed uranium. Any annealing medium which permits contact of the uranium metal with atmospheric gases tends to produce low elongation and ductility and a lowering of the ultimate strength.… more
Date: August 1, 1953
Creator: Hanks, G. S.; Taub , J. M. & Doll , D. T.
Partner: UNT Libraries Government Documents Department
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Collected Reports on Fission Cross Sections of U237 in Thermal Neutron, Intermediate Neutron, and Degraded Fission Neutron Spectra

Description: Part 1. The neutron fission cross section of U237 has been measured in a thermal neutron spectrum and in a somewhat degraded fission spectrum. The fission cross section for thermal neutrons is found to be <2 barns; the ratio of the fission cross section of U237 to that of U235 in the degraded fission spectrum is found to be 0.476 +- 15% which corresponds to [formula] in this spectrum equal to 0.66 +- 0.10 barns. Part 2. The average neutron fission cross section of U237 has been measured in a ne… more
Date: January 1, 1955
Creator: Cowan, G. A. (George A.), 1920-2012
Partner: UNT Libraries Government Documents Department
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The Preparation of the Hydrides of Magnesium and Beryllium

Description: This technical report summarizes the work which has been done to date on the preparation of magnesium hydride and the attempted preparation of beryllium hydride. Although pure beryllium hydride has not yet been made, the work is continuing, and this report indicates which phases are thought to be worth further work.
Date: April 1, 1954
Creator: Holley, Charles E., Jr.
Partner: UNT Libraries Government Documents Department
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Predicted Structure and Density of Beryllium Hydride

Description: Various properties of BeH/sub 2/ are predicted, based on the properties of neighboring hydrides. Included are predictions of the stability of the Be-H bond, the stability of an ionic lattice for BeH/sub 2/, polymeric structure, and density.
Date: December 1, 1953
Creator: Lemons, Jim F.; Lewis, W. B.; Fowler, R. D.; Staritzky, Eugene & Holley, Charles E., Jr.
Partner: UNT Libraries Government Documents Department
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Fabrication of Plutonium Ingots From Plutonium Turnings

Description: Kilogram quantities of delta-stabilized and pure plutonium turnings can be cast directly into ingots of normal quality with high yields. This report describes the equipment and process used.
Date: December 1, 1956
Creator: Johnson, Karl W. R.
Partner: UNT Libraries Government Documents Department
open access

Some Observations on the Reactivity of Plutonium Dioxide

Description: The index of refraction of PuO2 made by thermal decomposition of PU(C2O2, 6H2O gradually increases from a value < 1.9 to 2.40 as the decomposition temperature is increased from 150 degree to l000 degree C. This change in refractive index parallels a gradual change in the x-ray diffraction pattern from weak, diffuse lines for PuO2 ignited at 150° to sharp, well resolved lines for PuO2 ignited at 1000°C. Similar results are observed for PuO2 made by thermal decomposition of Pu2(C2O4)3*11H2O. The … more
Date: November 1, 1954
Creator: Bjorklund, C.W. & Staritzky, Eugene
Partner: UNT Libraries Government Documents Department
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