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Electromagnetic-Acoustic-Transducer/Synthetic-Aperture System for Thick-Weld Inspection

Description: Abstract: This report describes a system based on electromagnetic-acoustic transducers (EMATs) as an approach to automated nondestructive evaluation of thick weldments (>25 mm). Good signal-to-noise ratios, often a problem with EMATs, were possibTe through careful design of the transducers and associated electronic circuits and the use of signal averaging. At 454 kHz, the transducers produce shear-horizontal waves of approximately 7-mm wavelength in steel. The long wavelength permits determinatā€¦ more
Date: 1984
Creator: Fortunko, C. M.; Schramm, R. E.; Moulder, J. C. & McColskey, J. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Cerium-Based Magnets

Description: Advanced Research Projects Agency-Energy project sheet summarizing general information about the Rare Earth Alternatives in Critical Technologies (REACT) program including critical needs, innovation and advantages, impacts, and contact information. This sheet discusses magnets made of cerium as part of the "Novel High Energy Permanent Magnet Without Critical Elements" project.
Date: May 25, 2012
Creator: Ames Laboratory
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
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Uranium Hydride, a Review to January 1, 1944

Description: Abstract. A review of all work on uranium hydride published in the CC, CT, CN and CE reports to January 1, 1944, is presented. Some additional information not yet published has been included, so this report includes all data known from the above sources and at Ames to the above date. This report supersedes all previous report on uranium hydride coming out of the Ames laboratory.
Date: February 10, 1944
Creator: Newton, A. S.; Warf, J. C.; Johnson, O. & Nottorf, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Kinetics of the Alkylation and Acylation of Nickel Dipivaloyimethide

Description: Abstract: A study was made of the reactions of nickel dipivaloyimethide with the following reagents: tirphenylmethyl chloride, benzoyl chloride, [rho]-chloro and [rho]-methyl benzoyl chloride. Infrared spectra of the easily hydrolyzed product of tritylation seem to indicate that enol ether, the product of O-alkylation, is formed. the acyl halides reactor to give the triketones. the latter have been characterized by spectra and C, H, analysis. the kinetics of all the reactions studied were ā€¦ more
Date: July 1959
Creator: Johnson, Kenneth Eugene & Hammond, George Simms, 1921-2005
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Equation of State of Solids at Low Temperature

Description: Technical report describing and evaluating the the three experimental methods for obtaining equation of state data at low temperatures; (1) approximate measurement of the PVT relationship by a piston-displacement technique, (2) the measurement of a heat capacity at constant volume as a function of molar volume and temperature, and (3) direct measurement of the pressure variation of the elastic constants using ultrasonic techniques. X-ray methods also might be applicable.
Date: October 13, 1961
Creator: Bernardes, N. (Newton), 1931- & Swenson, C. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Uranium-Rhenium Alloy System

Description: Abstract The phase diagram of the uranium-rhenium alloy system is presented along with a discussion on transformation kinetics of the uranium solid solutions. The phase diagram is of the double eutectic type with the intermediate phase having the composition URe2. This phase exhibits allotropy at 180Ā°C and melts congruently at 2200Ā°C. URe2 reacts sluggishly with the uranium solid solutions below 750Ā°C to form the peritectoid compound U2Re. Eutectic reactions occur at 1105Ā° and 2105Ā°C at respecā€¦ more
Date: January 14, 1963
Creator: Jackson, R. J. (Robert James), 1929-; Williams, D. E. & Larsen, W. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Flame Spectra of Vanadium, Niobium, Rhenium, Titanium and Molybdenum

Description: Abstract Line spectra of vanadium, niobium, titanium, molybdenum and rhenium of sufficient intensity to allow detection at the 1ā€“10 p.p.m. level can be excited in fuel-rich, oxy-acetylene flames. For the strongest lines of tungsten, the sensitivity of detection is 90 p.p.m. Weak lines of zirconium, hafnium, osmium, tantalum and uranium are also observed in these flames. Recordings of the spectra are given along with wavelength tables of the strongest lines.
Date: July 23, 1962
Creator: Fassel, Velmer A.; Myers, Robert B. & Kniseley, Richard N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Magnesium-Uranium Alloy System

Description: Analytical, x-ray, thermal, and metallographic data have been obtained in the study of the magnesium-uranium system, and a proposed phase diagram has been constructed.
Date: 1954
Creator: Tracy, George A.; Chiotti, P. & Wilhelm, Harley A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Summary of Research on Experimental Refractory Bodies of High-Melting Nitrides, Carbides, and Uranium Dioxide

Description: First 31 pages of a quarterly report discussing the progress made on research projects during the period from October 1950 to December 1950. This section of the report discusses progress on studies of the metabolic properties of various elements.
Date: February 27, 1951
Creator: Chiotti, P. & Hamilton, J. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Summary of Research on Experimental Refractory Bodies of High-Melting Nitrides, Carbides, and Uranium Dioxide

Description: Abstract: A procedure for the preparation of the nitrides and carbides of several metals and the preparation of the refractory bodies from them is described. The investigation shows that reasonably strong and dense bodies can be prepared from these materials as well as from UOā‚‚. Evidence showing the tendency toward instability at high temperatures of Beā‚ƒNā‚‚, TaN, and ThN is presented. Evidence is also given indicating that the hexagonal structure reported by others for TaN is actually that for Tā€¦ more
Date: April 23, 1949
Creator: Chiotti, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The ScCl3-Sc System

Description: Experimental data supporting lower valence halides of scandium were not found in the literature. Our investigation was of the phase diagram of the ScCl3-Sc system, and also the vapor pressure-composition isotherm (at 960 degree) for this system. Investigation of the ScCl3-Sc system presented particular difficulties in comparison with analogous systems for rare earth elements in that ScCl3 is highly volatile (boiling pt. = 967 degree); according to our data the vapor pressure is 512 mm Hg measurā€¦ more
Date: April 1964
Creator: Polyachenok, O. G. & Novikov, G. I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Beta-Gamma Circularpolarization-Correlation of Sc46 and its Chemical Origins

Description: Appendix I, Determination of random coincidence in a fast-slow coincidence circuit; Appendix II, Multiple scattering during measurements of S-directional distribution from polarized nuclei, of S-y-circular polarization correlation, and of S-y-directional correlation.
Date: 1963
Creator: Daniel. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Heats of Reaction of Lanthanum Perchlorate Solutions with Perchloric Acid and with Hydrogen Halides

Description: The present paper is devoted to the determination of the heats of reaction of lanthanum ions with halogen ions within a broad concentration range of hydrogen halides. The enthalpies of the interaction of lanthanum perchlorate with perchloric and halogen acids increase with the increasing of acid molality from one to eight. The enthalpies of the interaction between lanthanum and halogen ions in water solutions are endothermic and decrease in the sequence; Cl > Br > J. The values support the factā€¦ more
Date: 1963
Creator: Latysheva, V. A. & Kozachenko, N. I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ames Laboratory Annual Summary Research Report in Metallurgy: 1960

Description: Annual summary documenting research related to metallurgy at Ames Laboratory. Discussions are given of developments in the following areas: the preparation and purification of metals; phase equlibria and thermodynamic properties of alloys; physical and mechanical properties of metals and alloys; solid state studies; separation processes; and investigations dealing with diffusion, oxidation, and reduction, halide reactions, preparations, vapor pressure measurements, and transport reactions. (B.ā€¦ more
Date: December 1960
Creator: Ames Laboratory
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Crystal Structures of Some Uranium Compounds : a Summary from the Ames Laboratory

Description: Introduction. Some forty different uranium compounds have now been given diffraction study at Ames. Reports of these investigations are scattered in the Project literature; many have been reported in a sentence or two as a note along with chemical or metallographic reports. To make the results of this crystal structure work more available this summary of the Ames work has been compiled. (A similar summary has already been published from the Chicago laboratory.)
Date: August 15, 1945
Creator: Rundle, R. E.; Baenziger, N. C. & Wilson, A. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of TH( NO3 ) -Ca( NO3 )2 ā€“HNO3 Solutions

Description: Abstract. Methods of analysis for thorium, calcium, and nitric acid in solutions from thorium extraction purification columns are described and the results and errors are outlined. A brief description of methods of analysis that were not successful is included.
Date: December 20, 1945
Creator: Warf, James C.; Patterson, J. H. & Banks, Charles V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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