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in subjects: "Titanium Alloys"

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Conceptual design of a superconducting magnet coil for the large coil program. [Flat-wound NbTi coils]

A conceptual design for a toroidal field (TF) coil for a six coil test array has been developed. The electromagnetic, cryogenic, structural, manufacturing, quality assurance and verification testing requirements have been analyzed. The bore is oval shaped and is 2.35 meters horizontally and 3.35 meters vertically. The coil is designed to operate at 8T peak field at rated current of 10450 amperes when the other 5 coils in the toroidal array are at 80% rated current. Using-flat-wound NbTi conduct… more

Date: January 1, 1977

Creator: Quay, R.; Bryant, R. W.; Koenig, R. F.; Ferrante, J. J.; Linkinhoker, C. L.; Donato, J. W. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

LLL total flow geothermal program: summary of two-phase nozzle tests for scale control and materials performance

A series of nozzle and wearblade tests to evaluate scale control and materials performance under total flow nozzle inlet conditions and simulated turbine blade environments was completed using Magmamax No. 1 well fluid. Brine acidification was effective in preventing scale in nozzles and on wearblade flow surfaces. Acid consumption measurements indicate that acid cost will be less than 2 mills/100 lb. brine. Measured erosion rates were low and the results indicate that available materials will … more

Date: December 1, 1977

Creator: Tardiff, G.E. (ed.)

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Method for fabricating a seal between a ceramic and a metal alloy

A method of fabricating a seal between a ceramic and an alloy comprising the steps of prefiring the alloy in an atmosphere with a very low partial pressure of oxygen, firing the assembled alloy and ceramic in air, and gradually cooling the fired assembly to avoid the formation of thermal stress in the ceramic. The method forms a bond between the alloy and the ceramic capable of withstanding the environment of a pressurized water reactor and suitable for use in an electrical conductivity sensiti… more

Date: July 24, 1981

Creator: Kelsey, P.V. Jr. & Siegel, W.T.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

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Cryogenic recovery analysis of forced flow supercritical helium cooled superconductors

A coupled heat conduction and fluid flow method of solution was presented for cryogenic stability analysis of cabled composite superconductors of large scale magnetic coils. The coils are cooled by forced flow supercritical helium in parallel flow channels. The coolant flow reduction in one of the channels during the spontaneous recovery transient, after the conductor undergoes a transition from superconducting to resistive, necessitates a parallel channel analysis. A way to simulate the parall… more

Date: August 1, 1977

Creator: Lee, A. Y.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Advanced Gas Cooled Nuclear Reactor Materials Evaluation and Development Program. Progress report, January 1, 1980-March 31, 1980

Results are presented of work performed on the Advanced Gas-Cooled Nuclear Reactor Materials Evaluation and Development Program. The objectives of this program are to evaluate candidate alloys for Very High Temperature Reactor (VHTR) Nuclear Process Heat (NPH) and Direct Cycle Helium Turbine (DCHT) applications, in terms of the effect of simulated reactor primary coolant (helium containing small amounts of various other gases), high temperatures, and long time exposures, on the mechanical prope… more

Date: June 25, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Surface damage of molybdenum and TZM alloy under D/sup +/ impact

The surface damage of polycrystalline molybdenum and TZM alloy under 40-, 60-, and 120-keV D/sup +/ impact has been investigated for irradiation in both pulsed and continuous mode for total doses varying from 1.7 x 10/sup 17/ to 2.2 x 10/sup 19/ ions/cm/sup 2/ and for target temperatures verying from ambient temperature to 400/sup 0/C. Analysis by scanning electron microscopy of the MO samples held at ambient temperatures during D/sup +/ irradiations in both pulsed and continuous modes revealed… more

Date: January 1, 1977

Creator: Das, S.K.; Kaminsky, M. & Dusza, P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Thermal strains in titanium aluminide and nickel aluminide composites

Neutron diffraction was used to measure residual thermal strains developed during postfabrication cooling in titanium aluminide and nickel aluminide intermetallic matrix composites. Silicon carbide /Ti 14Al-21Nb, tungsten and sapphire/NiAl, and sapphire and SiC-coated sapphire/NiAl{sub 25}Fe{sub 10} composites were investigated. The thermal expansion coefficient of the matrix is usually greater than that of the fibers. As such, during cooldown, compressive residual strains are generated in the … more

Date: January 1, 1992

Creator: Saigal, A. (Tufts Univ., Medford, MA (United States). Dept. of Mechanical Engineering) & Kupperman, D.S. (Argonne National Lab., IL (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Characterization of Nb-Ti superconductors with artificial pinning structures

A series of multifilamentary APC Nb-Ti superconductors have been made with Nb added as a normal second phase to provide flux pinning centers. Two compositions, 12.5% vol % and 25 vol % Nb in Nb-Ti, have fabricated into multifilamentary composites using two different fabrication methods. One method used hot isostatic compaction and hot extrusion thoughout the processing. The other method (bundle-and-draw process) discontinued all hot processing at an intermediate level. While the J{sub c} values… more

Date: June 1, 1990

Creator: Dietderich, D. R. & Scanlan, R. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Spin forming development

Bendix product applications require the capability of fabricating heavy gage, high strength materials. Five commercial sources have been identified that have the capability of spin forming metal thicknesses greater than 9.5 mm and four equiment manufacturers produce machines with this capability. Twelve assemblies selected as candidates for spin forming applications require spin forming of titanium, 250 maraging steel, 17-4 pH stainless steel, Nitronic 40 steel, 304 L stainless steel, and 6061 … more

Date: May 1, 1982

Creator: Gates, W.G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Superconductor development program at Lawrence Livermore Laboratory

Winding of a Nb--Ti test coil at the Lawrence Livermore Laboratory is nearly complete. The conductor in this coil operates in a maximum field of 7.5 T and provides the 2-T field required by the Mirror Fusion Test Facility. Nb/sub 3/Sn multifilamentary conductors, made using the ''bronze'' technique, appear capable of providing the higher fields needed by commercial reactors.

Date: January 19, 1978

Creator: Cornish, D.N.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Tensile and fracture properties of EBR-II-irradiated V-15Cr-5Ti containing helium

The alloy V-15Cr-5Ti was cyclotron-implanted with 80 appM He and subsequently irradiated in the Experimental Breeder Reactor (EBR-II) to 30 dpa. The same alloy was also irradiated in the 10, 20, and 30% cold-worked conditions. Irradiation temperatures ranged from 400 to 700/sup 0/C. No significant effects of helium on mechanical properties were found in this temperature range although the neutron irradiation shifted the temperature of transition from cleavage to ductile fracture to about 625/su… more

Date: January 1, 1986

Creator: Grossbeck, M.L. & Horak, J.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Background field coils for the High Field Test Facility

The High Field Test Facility (HFTF), presently under construction at LLNL, is a set of superconducting coils that will be used to test 1-m-o.d. coils of prototype conductors for fusion magnets in fields up to 12 T. The facility consists of two concentric sets of coils; the outer set is a stack of Nb-Ti solenoids, and the inner set is a pair of solenoids made of cryogenically-stabilized, multifilamentary Nb/sub 3/Sn superconductor, developed for use in mirror-fusion magnets. The HFTF system is d… more

Date: September 22, 1980

Creator: Zbasnik, J. P.; Cornish, D. N.; Scanlan, R. M.; Jewell, A. M.; Leber, R. L.; Rosdahl, A. R. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Critical current studies on fine filamentary NbTi accelerator wires

The magnets for the Superconductig Super Collider, a high energy proton colliding beam accelerator, require a superconductor with very high current density (>2400 A/mm/sup 2/ at 5 T) and very small filaments (approx. 2..mu..m in diameter). Previous work has shown that by controlling the formation of Cu/sub 4/Ti compound particles on the filament surfaces it is possible to make fine filamentary NbTi wire with high critical current density. The performance of multi-filamentary wire is characteriz… more

Date: January 1, 1985

Creator: Garber, M.; Suenaga, M.; Sampson, W.B. & Sabatini, R.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Optimization of film synthesized rare earth transition metal permanent magnet systems

Progress is reported in three areas: high coercivity Sm-Fe-Ti-V, Sm-Fe-Zr, and two element Sm-Fe Sm{sub 5}(Fe,T){sub 17} type crystalline phases; ThMn{sub 12} type pseudobinary SmFe{sub 12-x}T{sub x}(0{le}{times}{le}1.5); and sputter process control for the synthesis of precisely textured rare earth-transition metal magnetic films. (DLC)

Date: January 1, 1992

Creator: Cadieu, F.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Materials technology for accelerator production of fissile isotopes

The materials used for the accelerator production of fissile isotopes must enable the facility to achieve maximum fuel production at a minimum cost. Neutron production in the target would be maximized by use of thorium cooled with Pb--56 percent Bi or with sodium. The thorium should be ion-plated with approximately 1 mil of nickel or stainless steel for retention of fission products. The target container will have to be replaced at frequent intervals because of the copious quantities of neutron… more

Date: February 1, 1978

Creator: Horak, J.A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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NMR studies of hydrogen relaxation and diffusion in TiFeH/sub x/ and TiFe/sub 1-y/Mn/sub y/H/sub x/

TiFe and related intermetallic compounds react directly with hydrogen gas to form hydrides which are suitable for energy storage applications. Although some of the characteristics of these materials have been evaluated, many important physical properties such as crystal structures, electronic structures, and hydrogen diffusion behavior are unknown. Since nuclear magnetic resonance (NMR) provides detailed information on the physical states of the hydrogen atoms, various NMR parameters are being … more

Date: January 1, 1977

Creator: Bowman, R.C. Jr.; Carter, G.C.; Chabre, Y. & Attalla, A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Glass forming ranges of amorphous alloys

Two main methods of synthesis of amorphous metallic alloys are based on the rapid solidification of molten alloys and on isothermal solid state reactions between pure metals. We discuss recent calculations for the glass forming range for both techniques and we compare the predicted homogeneity ranges of the amorphous phase with experiments. 10 refs., 2 figs.

Date: January 1, 1988

Creator: Schwarz, R.B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Barium silicate glass/Inconel X-750 interaction. [PWR]

Water reactor safety programs at the Idaho National Engineering Laboratory have required the development of specialized instrumentation. An example is the electrical conductivity-sensitive liquid level transducer developed for use in pressurized-water reactors (PWRs) in which the operation of the sensing probe relies upon the passage of current through the water between the center pin of the electrode and its shell such that when water is present the resulting voltage is low, and conversely, wh… more

Date: January 1, 1980

Creator: Kelsey, P.V. Jr.; Siegel, W.T. & Miley, D.V.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Frank loop unfaulting mechanism in fcc metals during neutron irradiation

The unfaulting mechanism whereby sessile Frank dislocation loops evolve into a complex tangle of glissile dislocations during irradiation of face centered cubic metals is not well understood. It is presumed that such loops grow by absorption of point defects until interactions develop which provide sufficient impetus for nucleation of an unfaulting event. The loops then become glissile, interact and form a dislocation network. An alternate mechanism which has been observed to occur in an austen… more

Date: May 1980

Creator: Gelles, D. S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Hypervelocity launch capabilities to over 10 km/s

Very high pressure and acceleration is necessary to launch flier plates to hypervelocities. In addition, the high pressure loading must be uniform, structured, and shockless, i.e., time-dependent to prevent the flier plate from either fracturing or melting. In this paper, a novel technique is described which allows the use of megabar level loading pressures, and 10{sup 9} g acceleration to launch intact flier plates to velocities of 12.2 km/s. 32 refs., 2 figs.

Date: January 1, 1991

Creator: Chhabildas, L.C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Electrolysis based hydrogen storage systems. Annual report, January 1, 1976--December 31, 1976

This report describes work completed during the period January 1, 1976 to December 31, 1976, on an ERDA-sponsored program aimed at improvement in the cost and efficiency of electrolytic hydrogen production and development of the technique of using metal hydrides for hydrogen storage for stationary and transportation applications. The work on electrolytic hydrogen production includes work on advanced barrier materials for alkaline cells, studies of nickel alloy based and oxide catalysts for oxyg… more

Date: January 1, 1977

Creator: Salzano, F J

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Survey of physical property data for several alloys. [Nitronic 33; copper C10400; copper C17510]

This report summarizes an examination of physical property data available in the literature for six alloys of potential interest to the Toroidal Fusion Core Experiment in the Fusion Energy Program. The properties of thermal expansion, density, specific heat, electrical resistivity, and thermal conductivity were compiled for six alloys: Nitronic 33, a low-nickel, high manganese stainless steel; nickel-base Inconnel Alloys 625, 718, and X-750; and copper alloys C10400 and C17510. The temperatures… more

Date: August 1, 1985

Creator: Pawel, R. E. & Williams, R. K.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Research Toward New Alloys for Generator Retaining Rings

The research reported here was undertaken to develop an alloy suitable for use in the retaining rings of two-pole electrical generators that would have three key properties: a yield strength of 200 ksi or greater with good residual toughness; resistance to hydrogen embrittlement and stress-corrosion cracking; and processability through heat treatment after hot forming, to avoid the necessity of cold forming of the ring. The principal alloy developed during the course of this work was an iron-ba… more

Date: November 1, 1981

Creator: Morris, J. W., Jr. & Chang, K. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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In-sodium creep behavior of alloys M-813 and Nimonic PE16

The in-sodium biaxial creep deformation of internally pressurized tube specimens of alloys M-813 and Nimonic PE16 was measured at 650/sup 0/C under constant stress conditions after 4000 hours of sodium exposure. Each alloy had specimens at two different stress levels, viz., 0 and 165 MPa (24,000 psi). The data showed negative diameter changes at zero stress, which were attributed to material densification associated with precipitation. Although material densification was also seen in comparable… more

Date: April 1, 1980

Creator: Anantatmula, R.P. & Gilbert, E.R.

Item Type: Article

Partner: UNT Libraries Government Documents Department