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Development of microstructures with improved cryogenic toughness through local variations in stress state: Aluminum-lithium alloys

Description: Microstructurally-induced changes in the local stress state (triaxial constraint) and their effect on fracture-toughness behavior are examined at ambient and cryogenic temperatures in an Al-Li-Cu-Zr alloy, processed in the form of 12.7 mm-thick naturally laminated'' plate containing aligned-weak interfaces and 1.6 mm-thin unlaminated sheet. It is shown that marked improvements in long-transverse (L-T) toughness can be achieved in the plate material at cryogenic temperatures by promoting through… more
Date: April 1, 1990
Creator: Venkateswara Rao, K. T. & Ritchie, R. O.
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Partner: UNT Libraries Government Documents Department
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Fatigue-crack propagation in aluminum-lithium alloys processed by power and ingot metallurgy

Description: Fatigue-crack propagation behavior in powder-metallurgy (P/M) aluminum-lithium alloys, namely, mechanically-alloyed (MA) Al-4.0Mg-1.5Li-1.1C-0.80{sub 2} (Inco 905-XL) and rapid-solidification-processed (RSP) Al-2.6Li-1.0Cu-0.5Mg-0.5Zr (Allied 644-B) extrusions, has been studied, and results compared with data on an equivalent ingot-metallurgy (I/M) Al-Li alloy, 2090-T81 plate. Fatigue-crack growth resistance of the RSP Al-Li alloy is found to be comparable to the I/M Al-Li alloy; in contrast, c… more
Date: April 1, 1990
Creator: Venkateswara Rao, K.T.; Ritchie, R.O. (Lawrence Berkeley Lab., CA (United States)); Kim, N.J. (Pohang Inst. of Science and Technology (Korea, Republic of)) & Pizzo, P.P. (San Jose State Univ., CA (United States))
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Partner: UNT Libraries Government Documents Department
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Guide to Savannah River Laboratory Analytical Services Group

Description: The mission of the Analytical Services Group (ASG) is to provide analytical support for Savannah River Laboratory Research and Development Programs using onsite and offsite analytical labs as resources. A second mission is to provide Savannah River Site (SRS) operations with analytical support for nonroutine material characterization or special chemical analyses. The ASG provides backup support for the SRS process control labs as necessary.
Date: April 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary Design Report for the Yakima/Klickitat Production Project.

Description: A master plan for the Yakima/Klickitat Production Project (YKPP) was developed by the Northwest Power Planning Council (Council) on October 15, 1987, as a reasonable basis upon which the Bonneville Power Administration (BPA) could proceed to fund predesign work on the project. The Council approved the predesign work on the condition that eight preliminary tasks were completed. These tasks are: Task 1. Agreement on a refined statement of project goals. Task 2. Completion of a technical analysis … more
Date: April 1, 1990
Creator: United States. Bonneville Power Administration.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Microstructure and stability comparison of nanometer period W/C, WC/C, and Ru/C multilayer structures

Description: Multilayer structures of W/C, WC/C, and Ru/C, of various periods were prepared and studied by high-resolution transmission electron microscopy. Comparison of the phases in the layered structures is made for as-prepared and annealed samples. Both as-prepared and annealed WC/C multilayers are predominantly amorphous, while the phases in the W/C depend on the periods. The 2 nm period W/C multilayer remains amorphous after annealing, and the longer periods recrystallize to form W{sub 2}C. The layer… more
Date: April 1, 1990
Creator: Nguyen, T. D.; Gronsky, R. (Lawrence Berkeley Lab., CA (USA) California Univ., Berkeley, CA (USA). Dept. of Materials Science and Mineral Engineering) & Kortright, J.B. (Lawrence Berkeley Lab., CA (USA))
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Partner: UNT Libraries Government Documents Department
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Ion irradiation effects on a martensitic stainless steel designed for reduced long-life radioactivity

Description: Alloys with reduced long-life radioactivity (low activation alloys) are being developed to increase the acceptability of fusion power. The phase stability and swelling resistance of a 12Cr-6.5Mn-1W-0.3V-0.1C martensitic steel were evaluated by transmission electron microscopy following 3.8 MeV Fe{sup ++} ion irradiation with and without He coimplantation. Ion irradiations were performed at 450{degree}C, 550{degree}C, and 650{degree}C to approximately 10, 20, and 40 dpa. At 550{degree}C, approxi… more
Date: April 1, 1990
Creator: Griffin, R.D. (Wisconsin Univ., Madison, WI (USA). Fusion Technology Inst.); Zinkle, S.J. (Oak Ridge National Lab., TN (USA)); Dodd, R.A.; Kulcinski, G.L. (Wisconsin Univ., Madison, WI (USA)) & Gelles, D.S. (Pacific Northwest Lab., Richland, WA (USA))
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Partner: UNT Libraries Government Documents Department
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Chronic toxicity evaluation of simulated DWPF effluent to Ceriodaphnia dubia

Description: A 7-Day Full Series Chronic Toxicity test was conducted April 13--20, 1990, for the Savannah River Site to assess the chronic toxicity of Simulated defense waste processing facility (DWPF) effluent to Ceriodaphnia dubia. The simulated effluented consisted of Sodium Nitrate, Sodium Oxalate, Sodium Formate, and Corros. Inib.
Date: April 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of an advanced high efficiency coal combustor for boiler retrofit

Description: The objective of the program was to develop an advanced coal combustion system for firing beneficiated coal fuels (BCFs) capable of being retrofitted to industrial boilers originally designed for firing natural gas. The High Efficiency Advanced Coal Combustor system is capable of firing microfine coal-water fuel (MCWF), MCWF with alkali sorbent (for SO{sub 2} reduction), and dry microfine coal. Design priorities for the system were that it be simple to operate and offer significant reductions i… more
Date: April 1, 1990
Creator: LaFlesh, R. C.; Rini, M. J.; McGowan, J. G.; Beer, J. M. & Toqan, M. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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One regional ARM guide for climatic evaluation

Description: One of the early tasks of the Atmospheric Radiation Measurements (ARM) Program is to provide climatic guides for site selection purposes including possible continental, regional, local and on-site locations. The first guide A Preliminary ARM Guide for Climatic Evaluations'' provided some climate data on a continental scale; this one is an attempt to show the variability that exists over a region. Kansas was chosen for this particular guide because it satisfies most of the requirements given in … more
Date: April 1, 1990
Creator: Brown, R.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thin film synthesis using miniature pulsed metal vapor vacuum arc plasma guns

Description: Metallic coatings can be fabricated using the intense plasma generated by the metal vapor vacuum arc. We have made and tested an embodiment of vacuum arc plasma source that operates in a pulsed mode, thereby acquiring precise control over the plasma flux and so also over the deposition rate, and that is in the form of a miniature plasma gun, thereby allowing deposition of metallic thin films to be carried out in confined spaces and also allowing a number of such guns to be clustered together. T… more
Date: April 1, 1990
Creator: Godechot, X.; Salmeron, M.B.; Ogletree, D.F.; Galvin, J.E.; MacGill, R.A.; Dickinson, M.R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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High Burnup Effects Program

Description: This is the final report of the High Burnup Effects Program (HBEP). It has been prepared to present a summary, with conclusions, of the HBEP. The HBEP was an international, group-sponsored research program managed by Battelle, Pacific Northwest Laboratories (BNW). The principal objective of the HBEP was to obtain well-characterized data related to fission gas release (FGR) for light water reactor (LWR) fuel irradiated to high burnup levels. The HBEP was organized into three tasks as follows: Ta… more
Date: April 1, 1990
Creator: Barner, J. O.; Cunningham, M. E.; Freshley, M. D. & Lanning, D. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High speed data transmission at the Superconducting Super Collider

Description: High speed data transmission using fiber optics in the data acquisition system of the Superconducting Super Collider has been investigated. Emphasis is placed on the high speed data transmission system overview, the local data network and on subassemblies, such as optical transmitters and receivers. Also, the performance of candidate subassemblies having a low power dissipation for the data acquisition system is discussed. 14 refs., 5 figs.
Date: April 1, 1990
Creator: Leskovar, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of clean coal and clean soil technologies using advanced agglomeration technologies

Description: The specific objectives of the bituminous coal program were to explore and evaluate the application of advanced agglomeration technology for: (1)desulphurization of bituminous coals to sulphur content acceptable within the current EPA SO{sub 2} emission guidelines; (2) deashing of bituminous coals to ash content of less than 10 percent; and (3)increasing the calorific value of bituminous coals to above 13,000 Btu/lb. (VC)
Date: April 1, 1990
Creator: Ignasiak, B.; Pawlak, W.; Szymocha, K. & Marr, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Reactions of carbon atoms using crossed pulsed molecular beams

Description: In the second year of the current funding period, we continued the study of the following reactions: C({sup 1}D) + H{sub 2} {yields} CH(X{sup 2}{Omicron}) + H, {Delta}H = {minus}6.0 kcal.mol{sup {minus}1}; C({sup 1}D) + HCl {yields} CH(X{sup 2}{Omicron}) + Cl, {Delta}H = 7.0 kcal.mol{sup {minus}1}; and C({sup 1}D) + HCl {yields} CCl(X{sup 2}{Omicron}) + H, {Delta}H = {minus}5.8 kcal.mol{sup {minus}1}. In particular, we concentrated on three issues: the use of two-photon photolysis of C{sub 3}O{… more
Date: April 1, 1990
Creator: Reisler, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Local entropy generation analysis of a rotary magnetic heat pump regenerator

Description: The rotary magnetic heat pump has attractive thermodynamic performance but it is strongly influenced by the effectiveness of the regenerator. This study uses local entropy generation analysis to evaluate the regenerator design and to suggest design improvements. The results show that performance of the proposed design is dominated by heat transfer related entropy generation. This suggests that enhancement concepts that improve heat transfer should be considered, even if the enhancement causes a… more
Date: April 1, 1990
Creator: Drost, M. K. & White, M. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Molecular biological enhancement of coal biodesulfurization

Description: The overall objectives of this project is to use Molecular Genetics to develop strains of bacteria (esp. Rhodococcus) with enhanced ability to remove sulfur from coal, and to obtain data that will allow the performance and economics of a coal biodesulfurization process to be predicted. 5 figs.
Date: April 1, 1990
Creator: Bielaga, B. A. & Kilbane, J. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Study of fine and ultrafine particles for coal cleaning

Description: During the second quarter of work on this new project, critical review of the literature continued. Several new references related to gravity separation were identified and evaluated. A synopsis was assembled to summarize techniques developed by various researchers for the float/sink separation of ultrafine coal. In the reviewed literature, it was commonly concluded that substantial improvements in washability results for ultrafine coals can be obtained only through the application of dynamic (… more
Date: April 1, 1990
Creator: Birlingmair, D.; Buttermore, W.; Chmielewski, T. & Pollard, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Key structure-activity relationships in the vanadium phosphorus oxide catalyst system

Description: The crystal structure of vanadyl pyrophosphate has been redetermined using single crystals obtained from a near solidified melt of a microcrystalline catalyst sample. Crystals that index as vanadyl pyrophosphate obtained from this melt are variable in color. Crystallographic refinement of the single crystal x-ray diffraction data indicates that structural differences among these materials can be described in terms of crystal defects associated with linear disorder of the vanadium atoms. The imp… more
Date: April 1, 1990
Creator: Thompson, M.R. (Pacific Northwest Lab., Richland, WA (USA)) & Ebner, J.R. (Monsanto Co., St. Louis, MO (USA))
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Partner: UNT Libraries Government Documents Department
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Detection of radiocarbon in the cyclotrino

Description: A small low energy cyclotron (the cyclotrino''), which was proposed for direct detection of radiocarbon in 1980, has now detected radiocarbon at natural abundance. This device combines the suppression of background through the use of negative ions with the high intrinsic mass resolution of a cyclotron. A high current cesium sputter negative ion source generates a beam of carbon ions which is pre-separated with Wien filter and is transported to the cyclotron via a series of electrostatic lenses.… more
Date: April 1, 1990
Creator: Bertsche, K.J.; Karadi, C.A.; Muller, R.A. & Paulson, G.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Basic principles and mechanisms of selective oil agglomeration

Description: The overall objective is to determine the basic principles and mechanisms which underlie a number of selective oil agglomeration processes that have been proposed for beneficiating fine-size coal. An understanding of the basic principles and mechanisms will greatly facilitate technical development and application of such processes to various types of coal. 5 refs., 16 figs., 2 tabs.
Date: April 1, 1990
Creator: Wheelock, T.D.; Drzymala, J.; Allen, R. W.; Hu, Y. C.; Tyson, D. & Ziaoping, Qiu
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nocturnal flow on a western Colorado slope

Description: The Department of Energy sponsored Atomspheric Studies in Complex Terrain (ASCOT) program has conducted a research program designed to increase our knowledge and understanding of terrain-dominated flows with specific emphasis on nocturnal flows within mountain valleys. ASCOT has sponsored both field studies and numerical modeling efforts to improve our understanding of the wind, temperature and turbulence structure of nocturnal drainage flows. One of the most recent ASCOT sponsored field studie… more
Date: April 1, 1990
Creator: Leone, J. M. Jr. & Gudiksen, P. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electrostatic design of the barrel CRID (Cherenkov Ring Imaging Detector) and associated measurements

Description: We report on the electrostatic design and related measurements of the barrel Cherenkov Ring Imaging Detector for the Stanford Large Detector experiment at the Stanford Linear Accelerator Center Linear Collider. We include test results of photon feedback in TMAE-laden gas, distortion measurements in the drift boxes and corona measurements. 13 refs., 21 figs.
Date: April 1, 1990
Creator: Abe, K.; Hasegawa, K.; Suekane, F.; Yuta, H. (Tohoku Univ., Sendai (Japan). Dept. of Physics); Antilogus, P.; Aston, D. et al.
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Partner: UNT Libraries Government Documents Department
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Wake deficit measurements on the Jess and Souza Ranches, Altamont Pass

Description: This report is ninth in a series of documents presenting the findings of field test under DOE's Cooperative Field Test Program (CFTP) with the wind industry. This report provides results of a project conducted by Altamont Energy Corp. (AEC) to measure wake deficits on the Jess and Sousa Ranches in Altamont Pass, CA. This research enhances and complements other DOE-funded projects to refine estimates of wind turbine array effects. This project will help explain turbine performance variability ca… more
Date: April 1, 1990
Creator: Nierenburg, R. (Altamont Energy Corp., San Rafael, CA (USA))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High-. beta. operation and MHD (magnetohydrodynamic) activity on TFTR

Description: Magnetohydrodynamic (MHD) activity within three zones (core, half- radius, and edge) of TFTR (Plasma Physics and Controlled Nuclear Fusion Research (1986), (IAEA, Vienna, 1987), Vol. 1, P. 51) tokamak plasmas are discussed. Near the core of the plasma column, sawteeth are often observed. Two types of sawteeth are studied in detail: one with complete, and the other with incomplete magnetic reconnection. Their characteristics are determined by the shape of the q profile. Near the half-radius the … more
Date: April 1, 1990
Creator: McGuire, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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