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High-temperature oxidation and corrosion of materials program

Description: Research progress is reported in the behavior of metals and alloys in gas mixtures at high temperature, corrosion mechanisms in complex environments of low oxidizing potential, hot corrosion of nickel-base alloys at intermediate temperatures, corrosion of solid sulfate deposits, adherence of Al/sub 2/O/sub 3/ oxide films, oxidation behavior of a two-phase alloy Fe-44% Cu, and formation of subscales of varying composition. (FS)
Date: March 1, 1980
Creator: Whittle, D.P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Flash hydropyrolysis of coal. Quarterly report No. 2, April 1--June 30, 1977

Description: With the combination of low hydrogen to coal ratio, high coal feed rate and larger total quantity of coal fed, considerable liquid product is being condensed and collected. Experimental runs conducted at 750/sup 0/C and 800/sup 0/C at pressures up to 3000 psi of hydrogen show overall hydrocarbon yields and particularly gaseous hydrocarbon yields to increase with pressure to approximately 60 percent at 3000 psi. At 750/sup 0/C approximately one third (20 percent) of this yield is in the form of … more
Date: July 1, 1977
Creator: Fallon, P
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design and operation of small-scale glass melters for immobilizing radioactive waste

Description: A small-scale (3-kg), joule-heated, continuous melter has been designed to study vitrification of Savannah River Plant radioactive waste. The first melter built has been in nonradioactive service for nearly three years. This melter had Inconel 690 electrodes and uses Monofrax K-3 for the contact refractory. Several problems seem in this melter have had an impact on the design of a full-scale system. Problems include uncontrolled electric currents passing through the throat, and formation of a s… more
Date: January 1, 1980
Creator: Plodinec, M.J. & Chismar, P.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Flow instability in a vertical annulus under steady state and transient conditions

Description: Experimental data have been obtained for the occurrence of flow instability in a vertical annulus under steady state and transient down-flow conditions. The results show that the primary factor affecting the onset of flow instability is the Q{sub ratio} parameter (a measure of the void production in a channel). In addition, it is shown that for steady state conditions good agreement exists between the single annulus data and single tube data based upon the same L/D ratio. The results also indic… more
Date: January 1, 1992
Creator: Fighetti, C.; Kokolis, S.; Maciuca, C.; Reddy, D.G.; Yang, B.; Carrano, V. (Columbia Univ., New York, NY (United States)) et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Milliwatt generator project: Progress report, April 1983--March 1984

Description: This report covers progress on the Milliwatt Generator Project during April 1983--March 1984. Activities included (plutonium 238 oxide) fuel processing and characterization, production of heat sources, fabrication of pressure-burst test units, compatibility studies, impact testing, examination of surveillance units, Inconel weld development, and qualilty assurance.
Date: May 1, 1988
Creator: Rinehart, G.H. & Latimer, T.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Superplasticity in a nickel silicide alloy: Microstructural and mechanical correlations

Description: The superplastic properties of a nickel silicide based intermetallic alloy have been investigated as a function of strain, strain-rate, and temperature. The evolution of the microstructure during superplasticity, including grain growth, grain refinement, and cavitation, is reviewed. The relationship of the flow stress to strain and to strain-rate and the activation energy of the deformation process have been established. Finally, deformation mechanisms for superplasticity in the alloy at interm… more
Date: January 1, 1991
Creator: Stoner, S.L. (Lawrence Livermore National Lab., CA (United States)); Oliver, W.C. (Oak Ridge National Lab., TN (United States)) & Mukherjee, A.K. (California Univ., Davis, CA (United States). Dept. of Mechanical, Aeronautical and Materials Engineering)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Barium silicate glass/Inconel X-750 interaction. [PWR]

Description: 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: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Mach stem characterization in Mbar designs using RSR powder

Description: Suitable selection of powders can be used as a modeling device for complicated experimental designs. The powder melt zone is clearly defined and the RSR-834 powder is reasonably well behaved. This experiment was with only one composition, size and distribution. However, it is believed that other morphologies, composition, and size distributions could result in a more complete modeling of the compaction process that would enable heuristic calculations of the combined effects of adiabatic tempera… more
Date: January 1, 1985
Creator: Staudhammer, K.P. & Johnson, K.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Determination of surface oxide compositions on Alloy 600 using Rutherford backscattering

Description: The surface composition of oxides formed on Alloy 600 under conditions similar to those in the primary side of PWR heat exchangers has been studied as a function of potential using Rutherford backscattering and proton inelastic scattering. Electropolished samples of Alloy 600 were exposed at several potentials to a solution of 0.18M H/sub 3/BO/sub 3/(2000 ppM B) with 0.28M LiOH (1.4 ppM Li) at 300/sup 0/C for 450 hours. The potentials relative to an internal hydrogen electrode ranged from -.09 … more
Date: January 1, 1984
Creator: Hanson, A. L.; Isaacs, H. S. & Kraner, H. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Failure of sheathed thermocouples due to thermal cycling

Description: Open circuit failures (up to 100%) in small-diameter thermocouples used in electrically heated nuclear fuel rod simulator prototypes during thermal cycling tests were investigated to determine the cause(s) of the failures. The experiments conducted to determine the relative effects of differential thermal expansion, wire size, grain size, and manufacturing technology are described. It was concluded that the large grain size and embrittlement which result from certain common manufacturing anneal… more
Date: March 1, 1982
Creator: Anderson, R.L. & Ludwig, R.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Survey of physical property data for several alloys. [Nitronic 33; copper C10400; copper C17510]

Description: 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: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ultrasonic attenuation as a function of heat treatment and grain size in 79Ni--6Mo--15Fe alloy

Description: A pulse echo ultrasonic technique was used to measure the attenuation coefficient for 79Ni-6Mo-15Fe alloy specimens. The attenuation coefficient was determined using a 25 MHz ultrasonic transducer for specimens which had undergone different time-temperature heat treatments. The ultrasonic attenuation data versus heat treat time was used to assess grain size growth in the specimens.
Date: March 1, 1978
Creator: Gieske, J. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Materials for coal gasification. Effect of environment on stress rupture

Description: The biaxial stress rupture behavior for two of the alloys, Type 310 stainless steel and Haynes 188, is shown in figures. The other two alloys show similar behavior. The rupture parameter, P, is an empirical quantity which reflects the simultaneous effects of both temperature and duration of applied stress on stress rupture. Based on these results, several trends are apparent: (1) the biaxial stress rupture tests show the same trends and approximately the same stress rupture values as uniaxial d… more
Date: January 1, 1980
Creator: Horton, R.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Damage-rate gradient effects on radiation-induced segregation and phase stability in irradiated alloys

Description: Recent studies have shown that significant compositional redistribution in irradiated alloys can be induced by the gradients in the atomic displacement rates resulting from nonuniform defect production, in addition to the commonly-observed solute segregation at defect sinks. This process gives rise to complex local phase transformations during light-ion bombardment or irradiation with focused electron beams in the high-voltage electron microscope. Results of our theoretical and experimental inv… more
Date: July 1, 1985
Creator: Lam, N.Q. & Okamoto, P.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Compatibility of aluminide-coated Hastelloy x and Inconel 617 in a simulated gas-cooled reactor environment

Description: Commercially prepared aluminide coatings on Hastelloy X and Inconel 617 substrates were exposed to controlled-impurity helium at 850/sup 0/ and 950/sup 0/C for 3000 h. Optical and scanning electron (SEM) microscopy, electron microprobe profiles, and SEM X-ray mapping were used to evaluate and compare exposed and unexposed control samples. Four coatings were evaluated: aluminide, aluminide with platinum, aluminide with chromium, and aluminide with rhodium. With extended time at elevated temperat… more
Date: March 1, 1982
Creator: Chin, J.; Johnson, W. R. & Chen, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Composition of eta carbide in Hastelloy N after aging 10,000 hr at 815/sup 0/C

Description: The composition of the eta carbide in Hastelloy N containing 0.7 wt percent Si in the alloy approaches M/sub 12/C, rather than M/sub 6/C as indicated in the alloy literature. The silicon content of the eta phase in this case was about 25 at. percent, much higher than has been observed in less highly alloyed material. The data do not permit a definition of the limiting compositions of the phases.
Date: November 1, 1977
Creator: Leitnaker, J. M.; Potter, G. A.; Bradley, D. J.; Franklin, J. C. & Laing, W. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Study of grain boundary segregation using the Auger electron emission technique. Annual Technical Progress Report January 1, 1979-December 31, 1979

Description: The influence of grain boundary chemical composition on hydrogen embrittlement was investigated. Auger electron spectroscopy was employed to determine the grain boundary compositions of nickel-copper alloys containing various concentrations of phosphorus and subjected to various thermal treatments. Phosphorus segregates to grain boundaries during slow cooling, accompanied by reduced concentrations of grain boundary copper. Tensile tests were conducted in air and following cathodic charging with… more
Date: January 1, 1980
Creator: Stein, D. F.; Heldt, L. A. & Funkenbusch, A. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design and qualification testing of a strontium-90 fluoride heat source

Description: The Strontium Heat Source Development Program began at the Pacific Northwest Laboratory (PNL) in 1972 and is scheduled to be completed by the end of FY-1981. The program is currently funded by the US Department of Energy (DOE) By-Product Utilization Program. The primary objective of the program has been to develop the data and technology required to permit the licensing of power systems for terrestrial applications that utilize /sup 90/SrF/sub 2/-fueled radioisotope heat sources. A secondary ob… more
Date: December 1, 1981
Creator: Fullam, H. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Characterization of the sodium corrosion behavior of commercial austenitic steels

Description: During the course of an on-going evaluation of austenitic alloys for potential liquid metal fast breeder reactor (LMFBR) fuel pin cladding application, a series of commercial alloys was selected for study. The data obtained led to the recognition of an underlying pattern of behavior and enabled the prediction of surface chemistry changes. The changes in surface topographical development from alloy to alloy are shown and the important role played by the element molybdenum in this development is … more
Date: January 1, 1980
Creator: Shiels, S. A.; Bagnall, C.; Keeton, A. R.; Witkowski, R. E. & Anantatmula, R. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hot corrosivity of coal gasification products on gas turbine alloys. Summary report, 15 April 1978-15 November 1979

Description: The results of this investigation have produced mechanisms for the hot corrosion of a number of pure metals and alloys in the types of atmospheres likely to be obtained in turbines using coal conversion products as fuel. The results of these mechanistic studies suggest the following conclusions regarding application of alloys in these situations: (1) Simple Cr/sub 2/O/sub 3/-forming alloys of both Co and Ni have good hot corrosion resistance to most of the deposits likely to form in turbines bu… more
Date: January 1, 1979
Creator: Meier, G.H. & Gulbransen, E.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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In-sodium creep behavior of alloys M-813 and Nimonic PE16

Description: 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: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The effect of casting temperature on the fatigue properties of cast nickel aluminide alloys

Description: The results of high cycle fatigue tests at 650{degree}C on several cast Ni{sub 3}Al alloys are reported and compared to cast IN-713C. These alloys include IC-221M and several variations to the IC-221M composition. The effect of casting temperature is investigated using castings poured at three different temperatures spanning a 56{degree}C range. The results show that IC-221M cast at the highest temperature has the best fatigue strength, exceeding that for IN-713C. In these alloys, crack initiat… more
Date: January 1, 1991
Creator: Gieseke, B. & Sikka, V.K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Structure of ordered alloys

Description: Recent progress in studying ordered alloys by lattice fringe imaging is reviewed. Firstly the optimum experimental conditions for producing images suitable for interpretation are outlined. Secondly lattice and conventional imaging are compared and the advantages of the former for obtaining atomic level detail and compositional estimates are described. Finally some important results from this program are discussed, particularly the evidence for a microdomain model of short-range order and the fi… more
Date: August 1, 1977
Creator: Sinclair, R. & Thomas, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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