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A metallurgical investigation of a contour-forged disc of EME alloy

Description: Report presenting a study of the properties of EME alloy in the form of contour-forged discs for the rotors of gas turbines. The investigation was undertaken because the properties of promising alloys are dependent to a considerable extent on the conditions of fabrication and the size and shape of the rotor discs introduced fabrication procedures for which information was not available. Results regarding hardness surveys, short-time tensile properties, rupture test characteristics, time-deformation characteristics, creep strengths, stability characteristics, and data from tests in other laboratories are provided.
Date: November 1948
Creator: Reynolds, E. E.; Freeman, J. W. & White, A. E.
Partner: UNT Libraries Government Documents Department

Shear strength at 75 F to 500 F of fourteen adhesives used to bond a glass-fabric-reinforced phenolic resin laminate to steel

Description: Fourteen adhesives used to bond a glass-fabric-reinforced phenolic resin laminate to steel were tested in order to determine their shear strengths at temperatures from 75 F to 500 F. Fabrication methods were varied to evaluate the effect of placing cloth between the facing surfaces to maintain a uniform bond-line thickness. One glass-fabric supported phenolic adhesive was found to have a shear strength of 3,400 psi at 300 F and over 1,000 psi at 500 F. Strength and fabrication data are tabulated for all adhesives tested.
Date: December 1956
Creator: Davidson, John R.
Partner: UNT Libraries Government Documents Department

Analysis of Shock-Void Experiment

Description: The authors compare CALE simulations with recent experimental results of a laser-induced shock traversing a spherical under-dense region (''void''). In this report the experimental results are described, as well as several numerical attempts at explaining the observed radiographs. The conclusion is that the numerical simulations at this time cannot satisfactorily explain the experiment. The simulations also indicate that the introduction of air gaps between the under-dense sphere and the surrounding foam can greatly change the behavior of the shocked sphere. Thus fabrication details may play an important role in the detailed evolution of this experiment. Regardless of the simulations, analysis of the observed time sequence indicates that reproducibility of this experiment may be a factor. To settle this issue, further experiments of this kind will be required.
Date: May 2, 2003
Creator: Woods, D T; Robey, H & Stry, P
Partner: UNT Libraries Government Documents Department

Fabrication Techniques and Heat-Transfer Results for Cast-Cored Air-Cooled Turbine Blades

Description: Memorandum presenting an investigation to devise an air-cooled turbine blade which eliminated the difficulties encountered with brazing in air-cooled-blade fabrication. Techniques were developed for casting air-cooled blades with a large number of relatively small cooling passages near the airfoil surface; two such blades of HS-21 material were operated in a turbojet engine modified for air cooling. Results regarding the heat-transfer characteristics, stress and durability results, and evaluation of cast-cored-blade potential are provided.
Date: June 22, 1956
Creator: Freche, John C. & Oldrieve, Robert E.
Partner: UNT Libraries Government Documents Department

"Bottom-up" meets "top-down" : self-assembly to direct manipulation of nanostructures on length scales from atoms to microns.

Description: This document is the final SAND Report for the LDRD Project 102660 - 'Bottomup' meets 'top-down': Self-assembly to direct manipulation of nanostructures on length scales from atoms to microns - funded through the Strategic Partnerships investment area as part of the National Institute for Nano-Engineering (NINE) project.
Date: April 1, 2009
Creator: Swartzentruber, Brian Shoemaker
Partner: UNT Libraries Government Documents Department

Flexible Holographic Fabrication of 3D Photonic Crystal Templates with Polarization Control through a 3D Printed Reflective Optical Element

Description: This article systematically studies the holographic fabrication of three-dimensional (3D) structures using a single 3D printed reflective optical element (ROE), taking advantage of the ease of design and 3D printing of the ROE.
Date: July 21, 2016
Creator: Lowell, David; George, David; Lutkenhaus, Jeffrey; Tian, Chris; Adewole, Murthada; Zhang, Hualiang et al.
Partner: UNT College of Arts and Sciences

Integrated Recycling Test Fuel Fabrication

Description: The Integrated Recycling Test is a collaborative irradiation test that will electrochemically recycle used light water reactor fuel into metallic fuel feedstock. The feedstock will be fabricated into a metallic fast reactor type fuel that will be irradiation tested in a drop in capsule test in the Advanced Test Reactor on the Idaho National Laboratory site. This paper will summarize the fuel fabrication activities and design efforts. Casting development will include developing a casting process and system. The closure welding system will be based on the gas tungsten arc burst welding process. The settler/bonder system has been designed to be a simple system which provides heating and controllable impact energy to ensure wetting between the fuel and cladding. The final major pieces of equipment to be designed are the weld and sodium bond inspection system. Both x-radiography and ultrasonic inspection techniques have been examine experimentally and found to be feasible, however the final remote system has not been designed. Conceptual designs for radiography and an ultrasonic system have been made.
Date: March 1, 2013
Creator: Fielding, R.S.; Kim, K.H.; Grover, B.; Smith, J.; King, J.; Wendt, K. et al.
Partner: UNT Libraries Government Documents Department

Metallic Fuel Casting Development and Parameter Optimization Simulations

Description: One of the advantages of metallic fuel is the abilility to cast the fuel slugs to near net shape with little additional processing. However, the high aspect ratio of the fuel is not ideal for casting. EBR-II fuel was cast using counter gravity injection casting (CGIC) but, concerns have been raised concerning the feasibility of this process for americium bearing alloys. The Fuel Cycle Research and Development program has begun developing gravity casting techniques suitable for fuel production. Compared to CGIC gravity casting does not require a large heel that then is recycled, does not require application of a vacuum during melting, and is conducive to re-usable molds. Development has included fabrication of two separate benchscale, approximately 300 grams, systems. To shorten development time computer simulations have been used to ensure mold and crucible designs are feasible and to identify which fluid properties most affect casting behavior and therefore require more characterization.
Date: March 1, 2013
Creator: Fielding, R.S.; Crapps, J.; Unal, C. & Kennedy, J.R.
Partner: UNT Libraries Government Documents Department

Low-temperature fabrication of transparent silicon nitride

Description: Feasibility of producing nano-phase Si{sub 3}N{sub 4} with improved properties, and ultrafine-grained nano-phase transparent Si{sub 3}N{sub 4} by working with amorphous nano-size powders without the use of sintering aids was investigated. The approach uses cryogenic compaction of nano-size particles under liquid nitrogen followed by pressureless sintering.
Date: May 31, 1994
Creator: Chen, Wei; Malghan, S. G.; Danforth, S. C. & Pechenik, A.
Partner: UNT Libraries Government Documents Department

Holographic fabrication of 3D photonic crystals through interference of multi-beams with 4 + 1, 5 + 1 and 6 + 1 configurations

Description: This article fabricates 3D photonic crystals or quasi-crystals through single beam and single optical element based holographic lithography.
Date: September 9, 2014
Creator: George, David; Lutkenhaus, Jeffrey; Lowell, David; Moazzezi, Mojtaba; Adewole, Murthada; Philipose, Usha et al.
Partner: UNT College of Arts and Sciences