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High-temperature turbine technology program hot-gas path development test. Part II. Testing

Description: This topical report of the US Department of Energy High-Temperature Turbine Technology (DOE-HTTT) Phase II program presents the results of testing full-scale water-cooled first-stage and second-stage turbine nozzles at design temperature and pressure to verify that the designs are adequate for operation in a full-scale turbine environment. Low-cycle fatigue life of the nozzles was demonstrated by subjecting cascade assemblies to several hundred simulated startup/shutdown turbine cycles. This te… more
Date: March 1, 1982
Creator: Horner, M. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Low strain diameter expansion of internally pressurized Zircaloy-4 tubing at high temperatures

Description: Tests of closed-end, internally pressurized, Zircaloy-4 tubing specimens were utilized to develop low strain creep characteristics as a function of time at temperatures in the range of 1475/sup 0/F to 2000/sup 0/F (802/sup 0/C to 1093/sup 0/C) and hoop stresses in the range of 250 to 2500 psi for use in loss-of-coolant accident (LOCA) analyses. The strain rate above the start of the alpha to beta phase transformation region, approximately 1490/sup 0/F (810/sup 0/C), was found to be sensitive to… more
Date: March 1978
Creator: White, L.S. & Busby, C.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dynamic shear behavior of alumina-filled epoxy

Description: Thin-walled tubular specimens of alumina-filled epoxy were loaded in torsion at a strain rate of approximately 10/sup 3/ s/sup -1/ using a stored-torque Kolsky bar. In addition to measuring the time resolved shear stress and shear strain in the specimen, the axial stress generated by the dilation of the material during shear deformation was also obtained as a function of time. Tests were conducted at room temperature and at -60/sup 0/C. At room temperature, a moderate amount of plastic deformat… more
Date: March 1, 1982
Creator: Costin, L.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessment of lamellar tearing

Description: Information on lamellar tearing is summarized and related to proposed ASME Code requirements. Lamellar tearing is characterized as a complex phenomenon related to poor short transverse ductility and through-thickness strain. The material, welding, and design variables that affect lamellar tearing are shown to be complex and interrelated. The commonly reported tests for assessing material susceptibility are described, with the controversy over their validity being carefully detailed. Although th… more
Date: March 1, 1978
Creator: McEnerney, J.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nuclear mass formula with a neutron skin degree of freedom and finite-range model for the surface energy

Description: We study the possibility of extending the model used by Moeller and Nix in 1980 to calculate nuclear masses and fission barriers for nuclei throughout the periodic system, to describe compressibility effects and the existence of a neutron skin. 9 references. (WHK)
Date: March 1, 1984
Creator: Moeller, P. & Myers, W.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Investigation of methylpentene polymer (TPX) molding resin. Final report

Description: A polymethylpentene polymer (TPX) produced by Mitsui Petrochemical Industries, Ltd., Japan, was evaluated and compared to a TPX previously obtained from Imperial Chemical Industries, Ltd., England, who no longer produce TPX and have sold their manufacturing process for this polymer to Mitsui. The rheological, chemical, and physical properties of the materials were compared and the two materials were found to be essentially identical.
Date: March 1, 1978
Creator: Walter, C.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analysis of flow data from the DOW/DOE L. R. Sweezy No. 1 well

Description: This topical report presents the results of work to-date on the analysis and simulation of flow and pressure data from the testing of the L.R. Sweezy No. 1 well. Analysis of drawdown data indicates a formation permeability of around 126 md, and a flow-rate dependent skin. The conventional analysis techniques were, however, found to be inadequate for analyzing the buildup data. The formation properties inferred from the drawdown were used together with the CHARGR simulator to simulate the produc… more
Date: March 1, 1984
Creator: Garg, S. K. & Riney, T. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Advances in materials science, Metals and Ceramics Division. Triannual progress report, October 1979-January 1980

Description: Progress is summarized concerning magnetic fusion energy materials, laser fusion energy, aluminium-air battery and vehicle, geothermal research, oil-shale research, nuclear waste management, office of basic energy sciences research, and materials research notes. (FS)
Date: March 31, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fatigue and environmentally assisted cracking in light water reactors

Description: Fatigue and stress corrosion cracking (SCC) for low-alloy steel used in piping and in steam generator and reactor pressure vessels have been investigated. Fatigue data were obtained on medium-sulfur-content A533-Gr B and A106-Gr B steels in high-purity (HP) deoxygenated water, in simulated pressurized water reactor water, and in air. Analytical studies focused on the behavior of carbon steels in boiling water reactor (BWR) environments. Crack-growth rates of composite fracture-mechanics specime… more
Date: March 1, 1992
Creator: Kassner, T.F.; Ruther, W.E.; Chung, H.M.; Hicks, P.D.; Hins, A.G.; Park, J.Y. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

System for vacuum pouring of epoxy tensile and impact specimens with a study of the behavior of these specimens at 77 K and 293 K. [Epon 828, Epon 871, and Epon curing agent 2]

Description: The purpose of the investigation described in this report was to establish a suitable technique for vacuum pouring of epoxy test specimens and to study the behavior of these specimens at 77 K and 293 K. A series of tensile and impact tests was conducted using specimens made from the following resins: Epon 828, Epon 871, and Epon curing agent Z. These materials are of general interest to designers of magnets for cryogenic service. Some of the applications that may be considered are: structural s… more
Date: March 1, 1978
Creator: Fitzpatrick, C.M. & Stoddart, W.C.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

System for vacuum pouring of epoxy tensile and impact specimens with a study of the behavior of these specimens at 77 K and 293 K

Description: The purpose of the investigation was to establish a suitable technique for vacuum pouring of epoxy test specimens and to study the behavior of these specimens at 77 K and 293 K. A series of tensile and impact tests was conducted using specimens made from the following resins: Epon 828, Epon 871, and Epon curing agent Z. These materials are of general interest to designers of magnets for cryogenic service. Tests of the specimens were carried out at 77 K and 293 K. The 77 K data indicate that ten… more
Date: March 31, 1978
Creator: Fitzpatrick, C.M. & Stoddart, W.C.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Demonstration of fuel resistant to pellet-cladding interaction: Phase 2. Second semiannual report, July-December 1979

Description: This program has as its ultimate objective the demonstration of an advanced fuel design that is resistant to the failure mechanism known as fuel pellet-cladding interaction (PCI). Two fuel concepts are being developed for possible demonstration within this program: (a) Cu-barrier fuel and (b) Zr-liner fuel. In the current report period the nuclear design of the demonstration was begun. The design calls for 132 bundles of barrier fuel to be inserted into the core of Quad Cities Unit 2 at the beg… more
Date: March 1, 1980
Creator: Rosenbaum, H.S. (comp.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Interconnect fatigue design for terrestrial photovoltaic modules

Description: Fatigue of solar cell electrical interconnects due to thermal cycling has historically been a major failure mechanism in photovoltaic arrays; the results of a comprehensive investigation of interconnect fatigue that has led to the definition of useful reliability-design and life-prediction algorithms are presented. Experimental data gathered in this study indicate that the classical strain-cycle (fatigue) curve for the interconnect material is a good model of mean interconnect fatigue performan… more
Date: March 1, 1982
Creator: Mon, G. R.; Moore, D. M. & Ross, R. G., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Probabilistic models of the stress-rupture of composite materials: Phase III. Progress report, June 15, 1978-June 14, 1980

Description: The development of static and time dependent models for the failure of composite materials has been pursued. These models are based on the chain-of-bundles probability model for composite failure wherein local load sharing among non-failed fiber elements in a bundle plays a key role. At the outset, it was believed that the static model was well developed in the literature by others, and that work on the time dependent versions could proceed. In these versions, the viscoelasticity of the matrix … more
Date: March 1, 1980
Creator: Phoenix, S.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Physical processes of compaction companion report 1 to simulation of geothermal subsidence

Description: There are a variety of theories, techniques, and parameters in the subsidence literature. Biot's theory, Terzaghi's theory, and the theory of interacting continua (TINC) are used to explain solid-fluid interaction; stress-strain theories range from linear elastic to e-log p to plasticity and pore-collapse theories. Parameters are numerous: void ratio,, permeability, compaction coefficient, pore compressibility, Young's modulus, bulk modulus, shear modulus, Poisson's ratio, Lame coefficients, co… more
Date: March 1, 1980
Creator: Miller, I.; Dershowitz, W.; Jones, K.; Myer, L.; Roman, K. & Schauer, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Metallographic examinations of Type 304 stainless steel (heat 9T2796) tested in high-temperature uniaxial and multiaxial experiments

Description: The results obtained from a number of metallographic examinations of Type 304 stainless steel specimens were compiled. Samples were obtained from uniaxial and multiaxial tests covering a very broad span of temperatures and times. Special emphasis was on the identification of failure modes, cracking patterns, grain distortion, and grain-boundary microstructures. Uniaxial specimens exhibited the following sequence of failure modes with increasing temperature and time: ductile plastic tearing, duc… more
Date: March 1, 1984
Creator: Swindeman, R.W. & Houck, C.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mechanical properties of polystyrene bead encapsulation foam

Description: The tensile and compressive properties of polystyrene bead foam used as an encapsulant for electronic devices were determined for densities ranging from 0.3 to 0.6 g/cm/sup 3/. Data were generated for these properties at -54, 25, and 74/sup 0/C. Data previously reported for 0.2 g/cm/sup 3/ are included.
Date: March 1, 1980
Creator: Fossey, D.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

OTEC cold water pipe design for problems caused by vortex-excited oscillations

Description: Vortex-excited oscillations of marine structures result in reduced fatigue life, large hydrodynamic forces and induced stresses, and sometimes lead to structural damage and to diestructive failures. The cold water pipe of an OTEC plant is nominally a bluff, flexible cylinder with a large aspect ratio (L/D = length/diameter), and is likely to be susceptible to resonant vortex-excited oscillations. The objective of this report is to survey recent results pertaining to the vortex-excited oscillati… more
Date: March 14, 1980
Creator: Griffin, O. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Studies of near-surface phenomena and erosion mechanisms in metallic alloys using single- and multi-particle impacts

Description: An experimental study of the effects of material properties on erosion mechanisms was conducted by subjecting targets to single as well as multiple impacts of spherical particles at various velocities. A mechanical properties microprobe was used to monitor the hardening due to the impacts. Initial studies on several engineering alloys showed that work hardening was associated with single impacts, and the results suggested that the capacity to distribute the impact energy over large volumes impr… more
Date: March 1, 1992
Creator: Rao, M. & Keiser, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ductile-Brittle Transition Temperature testing of tungsten using the three-point bend test

Description: Three-point bend tests were performed to determine the Ductile-Brittle Transition Temperatures (DBTTs) of forged and chemical vapor deposition (CVD) tungsten. Testing was performed under quasi-static conditions at temperatures between 23{degrees}C and 450{degrees}C using a forced-air environmental chamber. Load-displacement data from the three-point bend tests indicated that the constitutive behavior of the materials tested varied considerably. Finite element modeling of the three-point bend te… more
Date: March 5, 1991
Creator: Lassila, D.H.; Magness, F. & Freeman, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Flow loop studies with AMAX coal-water mixtures

Description: The coal-water mixtures (CWM) with a stabilizer and the CWM without stabilizers were successfully transported through a flow loop facility under a variety of conditions. The handling characteristics of both CWM were reasonable. The mix tank mixer was not needed during nontesting hours to prevent settling of either material. After several days of transporting the nonstabilized material in the loop facility, the viscosity-reducing agent became ineffective. It was necessary to increase the concent… more
Date: March 1, 1984
Creator: Wildman, D.J. & Ekmann, J.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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