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Scale effects in sliding friction: An experimental study

Description: Solid friction is considered by some to be a fundamental property of two contacting materials, while others consider it to be a property of the larger tribosystem in which the materials are contained. A set of sliding friction experiments were designed to investigate the hypothesis that the unlubricated sliding friction between two materials is indeed a tribosystems-related property and that the relative influence of the materials properties or those of the machine on friction varies from one s… more
Date: July 24, 1991
Creator: Blau, P.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The effect of yield strength on side-bonding upset welds

Description: During the course of 9{degree} tapered side-bonding resistance upset weld development at Mound, various studies have been conducted to evaluate the effect of yield strength on welds in 304L stainless steel. The results of these studies have concluded that at high yield strengths there may be a minor reduction in the length of Class 2 or better bond. Satisfactory welds have been produced with materials having yield strengths ranging from 36.0 to 141.0 ksi. However, when body yield strengths exce… more
Date: September 24, 1991
Creator: Miller, R. G. & Perkins, M. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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DYNA3D Material Model 71 - Solid Element Test Problem

Description: A general phenomenological-based elasto-plastic nonlinear isotropic strain hardening material model was implemented in DYNA3D for use in solid, beam, truss, and shell elements. The constitutive model, Model 71, is based upon conventional J2 plasticity and affords optional temperature and rate dependence (visco-plasticity). The expressions for strain hardening, temperature dependence, and rate dependence allow it to represent a wide variety of material responses. Options to capture temperature c… more
Date: January 24, 2008
Creator: Zywicz, E
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of a Versatile Laser Ultrasonic System and Application to On-Line Measurement for Process Control of Wall Thickness and Eccentrictiy of Steel Seamless Mechanical Tubing

Description: Researchers at the Timken Company conceived a project to develop an on-line instrument for wall thickness measurement of steel seamless mechanical tubing based on laser ultrasonic technology. The instrument, which has been installed and tested at a piercing mill, provides data on tube eccentricity and concentricity. Such measurements permit fine-tuning of manufacturing processes to eliminate excess material in the tube wall and therefore provide a more precisely dimensioned product for their cu… more
Date: April 24, 2002
Creator: Kisner, R. A.; Kercel, S. W.; Damiano, B.; Bingham, P. R.; Gee, T. F.; Tucker, R. W. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tritium permeation through characterized films on Type 304L stainless steel

Description: Rocky Flats is looking for an optimum method for surface treating 304L stainless steel to increase its resistance to tritium permeation. Selected surface treatments were applied to 304L samples. One set of samples was shipped to the Rockwell Corporate Science Center for alternate characterization analysis. Another set was sent to Los Alamos National Laboratory for tritium exposure and ion beam spectrographic analysis. The Science Center performed the following analyses: ellipsometry, contact po… more
Date: July 24, 1987
Creator: Kallas, A.J.; Rising, T.L.; Childs, E.L. & Thomas, R.L. (ed.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Corrosion evaluation of cooling-water treatments for gas centrifuge facilities

Description: The corrosion resistance of six different types of weighted metal coupons was evaluated at 29/sup 0/C (84/sup 0/F) in flowing water containing nitrite-borate-silicate corrosion inhibitors. The question for evaluation was whether it would be more advantageous: (1) to drain the treated cooling water from the centrifuge machine and to expose them to moisture-laden air over an assumed shop downtime and repair perid of 1 month; or (2) to let the treated cooling water remain stagnant in the machines … more
Date: November 24, 1980
Creator: Schmidt, C. R. & Meredith, P. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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TREATMENT TANK CORROSION STUDIES FOR THE ENHANCED CHEMICAL CLEANING PROCESS

Description: Radioactive waste is stored in high level waste tanks on the Savannah River Site (SRS). Savannah River Remediation (SRR) is aggressively seeking to close the non-compliant Type I and II waste tanks. The removal of sludge (i.e., metal oxide) heels from the tank is the final stage in the waste removal process. The Enhanced Chemical Cleaning (ECC) process is being developed and investigated by SRR to aid in Savannah River Site (SRS) High-Level Waste (HLW) as an option for sludge heel removal. Corr… more
Date: August 24, 2011
Creator: Wiersma, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MFH Top-Half Ring Connectros

Description: In the end calorimeter of the D-zero experiment, uranium and stainless steel plates are assembled into modules which are to be installed into the cryostat as individual units. A single inner module will be surrounded by 16 middle modules, which are surrounded by 16 outer modules. The 16 modules which comprise the middle ring are to be connected at the outer radius by a link, which is pinned to each front plate. The expected forces at each of the 16 connections vary from 1400 Ib to 69,000 lb (Ap… more
Date: October 24, 1988
Creator: Nachtrieb, Rob
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ALTERNATIVE AND ENHANCED CHEMICAL CLEANING: BASIC STUDIES RESULTS FY2010

Description: In an effort to develop and optimize chemical cleaning methods for the removal of sludge heels from High Level Waste tanks, solubility tests have been conducted using nonradioactive, pure metal phases. The metal phases studied included the aluminum phase gibbsite and the iron phases hematite, maghemite, goethite, lepidocrocite, magnetite, and wustite. Many of these mineral phases have been identified in radioactive, High Level Waste sludge at the Savannah River and Hanford Sites. Acids evaluate… more
Date: January 24, 2011
Creator: King, W. & Hay, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

CC Cryostat Cooldown Test Warmup

Description: This report discusses the warming up of the stainless steel inner vessel of the CC Cryostat back to room temperature after it has been cooled down by liquid nitrogen. It considers the sufficiency of a standard magnet warm-up 12KW heater in delivering enough heat to warm the Crypstat in a couple of days. The concept of sufficiency will be answered by the following questions, and by an experimental test that was made of the heater in question.
Date: September 24, 1987
Creator: Peterson, T. & Fitzpatrick, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Contribution to Fusion Materials Semiannual Report

Description: The objectives of this work are the following: (1) The application of micro and mesoscale modeling techniques to study dislocation properties in ferritic and W-based materials; and (2) The development of computational models and tools to study damage accumulation in >1 dpa (fusion-like) conditions, both for Fe and W-based alloys. The high-temperature strength of structural ferritic alloys (ferritic/martensitic steels, ODS steels, bcc refractory alloys) hinges on the thermal stability of seco… more
Date: February 24, 2012
Creator: Marian, J. & Meier, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Liquid Wall Chambers

Description: The key feature of liquid wall chambers is the use of a renewable liquid layer to protect chamber structures from target emissions. Two primary options have been proposed and studied: wetted wall chambers and thick liquid wall (TLW) chambers. With wetted wall designs, a thin layer of liquid shields the structural first wall from short ranged target emissions (x-rays, ions and debris) but not neutrons. Various schemes have been proposed to establish and renew the liquid layer between shots inclu… more
Date: February 24, 2011
Creator: Meier, W. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Materials for Geothermal Production

Description: Advances in the development of new materials continue to be made in the Geothermal Materials Project. Many successes have already been accrued and the results used commercially. In FY 1991, work was focused on reducing well drilling, fluid transport and energy conversion costs. Specific activities performed included lightweight CO{sub 2}-resistant well cements, thermally conductive and scale resistant protective liner systems, chemical systems for lost circulation control, corrosion mitigation … more
Date: March 24, 1992
Creator: Kukacka, Lawrence E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of All-Solid-State Sensors for Measurement of Nitric Oxide and Ammonia Concentrations by Optical Absorption in Particle-Laden Combusion Exhaust Streams

Description: An all-solid-state continuous-wave (cw) laser system for ultraviolet absorption measurements of the nitric oxide (NO) molecule has been developed and demonstrated. For the NO sensor, 250 nW of tunable cw ultraviolet radiation is produced by sum-frequency-mixing of 532-nm radiation from a diode-pumped Nd:YAG laser and tunable 395-nm radiation from an external cavity diode laser (ECDL). The sum-frequency-mixing process occurs in a beta-barium borate crystal. The nitric oxide absorption measuremen… more
Date: September 24, 2003
Creator: Caton, Jerald A. & Annamalai, Kalyan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Environmental Degradation of Materials for Nuclear Waste Repositories Engineered Barriers

Description: Several countries are considering geological repositories for the storage of nuclear waste. Most of the environments for these repositories will be reducing in nature, except for the repository in the US, which is going to be oxidizing. For the reducing repositories, alloys such as carbon steel, copper, stainless steels and titanium are being evaluated. For the repository in the US, some of the most corrosion resistant commercially available alloys are being investigated. This paper presents a … more
Date: December 24, 2006
Creator: Rebak, R B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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NOVEL CHAMBER DESIGN FOR AN IN-VACUUM CRYO-COOLED MINI-GAP UNDULATOR.

Description: A stainless steel, Ultra-High Vacuum (UHV) chamber, featuring a large vertical rectangular port (53''W by 16''H), has been fabricated to house the one-meter magnet assembly of a newly installed undulator insertion device for beamline X-25 at the National Synchrotron Light Source. To achieve UHV, the new chamber is equipped with a differential ion pump, NEG pump, nude ion gauge, residual gas analyzer, and an all metal roughing valve. Temperature of the magnet assembly is maintained below 90 C du… more
Date: May 24, 2006
Creator: Hu, J.-P.; Foerster, C. L.; Skaritka, J. R. & Waterman, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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An in situ transmission electron microscopy study of the thermalstability of near-surface microstructures induced by deep rolling andlaser-shock peening

Description: Mechanical surface treatments are known to be effective at improving the fatigue resistance of metallic alloys at elevated temperatures ({approx}550-600 C), even though the near-surface compressive residual stress fields have been annealed out. We have investigated the thermal stability of near-surface microstructures induced by deep rolling and laser-shock peening in an austentic stainless steel (AISI 304) and a titanium alloy (Ti-6Al-4V) using in situ hot-stage transmission electron microscop… more
Date: February 24, 2003
Creator: Altenberger, I.; Stach, E. A.; Liu, G. Y.; Nalla, R. K. & Ritchie, R. O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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RATES OF CORROSION PRODUCT REMOVAL FROM CIRCULATING SYSTEM BY FILM FORMATION AND SETTLING

Description: Iron oxide deposits removed from high pressure system of HRT after the first power run will be annlyzed for Fe/sup 59/ in an attempt to determine the time these deposits were circulated prior to deposition (settling or film formation). Deposits available are film from corrosion specimens (stainless steel, zirconium and titanium) and settled particles. (auth)
Date: April 24, 1958
Creator: Suddath, J.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FINAL REPORT: Reduction in Energy Consumption and Variability in Steel Foundry Operations

Description: This project worked to improve the efficiency of the steel casting industry by reducing the variability that occurs because of process and product variation. The project focused on the post shakeout operations since roughly half of the production costs are in this area. These improvements will reduce the amount of variability, making it easier to manage the operation and improve the competitiveness. The reduction in variability will also reduce the need for many rework operations, which will re… more
Date: May 24, 2005
Creator: Peters, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Waste Form and Indrift Colloids-Associated Radionuclide Concentrations: Abstraction and Summary

Description: This Model Report describes the analysis and abstractions of the colloids process model for the waste form and engineered barrier system components of the total system performance assessment calculations to be performed with the Total System Performance Assessment-License Application model. Included in this report is a description of (1) the types and concentrations of colloids that could be generated in the waste package from degradation of waste forms and the corrosion of the waste package ma… more
Date: June 24, 2003
Creator: Aguilar, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Immobilization of Radionuclides in the Hanford Vadose Zone by Incorporation in Solid Phases

Description: The Department of Energy's Hanford Nuclear Site located in Washington State has accumulated over 2 million curies of radioactive waste from activities related to the production of plutonium (Ahearne, 1997). Sixty-seven of the single-shelled tanks located at the site are thought to have leaked, allowing between 2 and 4 million liters of waste fluids into the underlying vadose zone. The chemical processes employed at the Hanford Site to extract plutonium, as well as the need to minimize corrosion… more
Date: January 24, 2005
Creator: Gordon E. Brown, Jr.; Catalano, Jeffrey G.; Warner, Jeffrey A.; Shaw, Samual & Grolimund, Daniel
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Clean Cast Steel Technology, Phase IV

Description: The objective of the Clean Cast Steel Technology Program was to improve casting product quality by removing or minimizing oxide defects and to allow the production of higher integrity castings for high speed machining lines. Previous research has concentrated on macro-inclusions that break, chip, or crack machine tool cutters and drills and cause immediate shutdown of the machining lines. The overall goal of the project is to reduce the amount of surface macro-inclusions and improve the machina… more
Date: February 24, 2003
Creator: Bates, Charles E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Underground Corrosion of Activated Metals in an Arid Vadose Zone Environment

Description: The subsurface radioactive disposal site located at the Idaho National Engineering and Environmental Laboratory contains neutron-activated metals from nonfuel nuclear-reactor- core components. A long-term corrosion test is being conducted to obtain site-specific corrosion rates to support efforts to more accurately estimate the transfer of activated elements in an arid vadose zone environment. The tests use nonradioactive metal coupons representing the prominent neutron-activated material burie… more
Date: October 24, 2001
Creator: Adler Flitton, M. K.; Mizia, R. E. & Bishop, C. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Microclimate Corrosion Effects in Coastal Environments

Description: The Albany Research Center is conducting atmospheric corrosion research in coastal environments to improve the performance of materials in the Nation's infrastructure. The corrosion of bare metals, and of painted, thermal-sprayed, and galvanized steels are presented for one-year exposures at sites located on bridges and utility poles along the Oregon coast. The effects of microclimates (for example distance from the ocean, high wind zones, and salt-fog prone regions) are examined in conjunction… more
Date: March 24, 1996
Creator: Holcomb, G. R.; Covino, B. S., Jr.; Bullard, S. J. & Cramer, S. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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