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Laser Engineered Net Shaping (LENS(TM)): A Tool for Direct Fabrication of Metal Parts

Description: For many years, Sandia National Laboratories has been involved in the development and application of rapid prototyping and dmect fabrication technologies to build prototype parts and patterns for investment casting. Sandia is currently developing a process called Laser Engineered Net Shaping (LENS~) to fabricate filly dense metal parts dwectly from computer-aided design (CAD) solid models. The process is similar to traditional laser-initiated rapid prototyping technologies such as stereolithogr… more
Date: November 5, 1998
Creator: Atwood, C.; Ensz, M.; Greene, D.; Griffith, M.; Harwell, L.; Reckaway, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Understanding Thermal Behavior in Lens Processing of Structural Materials

Description: In direct laser metal deposition technologies, such as the Laser (LENS) process, it is important to understand and control the Engineered Net Shaping thermal behavior during fabrication. With this control, components can be reliably fabricated with desired structural material properties. This talk will describe the use of contact and imaging techniques to monitor the thermal signature during LENS processing. Recent results show a direct correlation between thermal history and material propertie… more
Date: November 5, 1998
Creator: Ensz, M. T.; Greene, D. L.; Griffith, M. L.; Harwell, L. D.; Hofmeister, W. H.; Nelson, D. V. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Fast Multipole Solvers for Three-Dimensional Radiation and Fluid Flow Problems

Description: A number of physics problems can be modeled by a set of N elements, which have pair-wise interactions with one another. The use of such elements for the evolution of vorticity in fluid flows and the calculation of the velocity field from the evolving vorticity field is well known. Fast multipole methods for fluid flow problems have been developed in we pmt to reduce computational effort to something less than O(N) . In this paper we develop a fast multipole solver with application to both 3-D r… more
Date: November 5, 1998
Creator: Baty, R. S.; Burns, S. P.; Gritzo, L. A.; Homicz, G. F. & Strickland, J. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ACCOMPLISHMENTS OF THE AMERICAN-POLISH PROGRAM FOR ELIMINATION OF LOW EMISSIONS IN KRAKOW

Description: In 1991, US and Polish officials signed a Memorandum of Understanding formally initiating and directing the Cracow Clean Fossil Fuels and Energy Efficiency Program. Developing a program approach for the most effective use of the available funds required considerable effort on the part of all project participants. The team recognized early that the cost of solving the low emissions problem even in only one city far exceeded the amount of available US funds. Economic conditions in Poland limited … more
Date: November 5, 1998
Creator: BUTCHER,T.A. & PIERCE,B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Functions and Requirements for a Waste Conveyance Jet Pump for the Gunite and Associated Tanks at Oak Ridge National Laboratory

Description: Since the mid 1940's, the U.S. Department of Defense (DOD) and the U.S. Department of Energy (DOE) have conducted research and development activities at the Oak Ridge National Laboratory (ORNL) in support of urgent national interests in the fields of nuclear weaponry and nuclear energy. Some of these activities resulted in radiologically hazardous waste being temporarily deposited at ORNL in Waste Area Grouping 1. At this location, waste is stored in several underground storage tanks, awaiting … more
Date: November 5, 1998
Creator: Mullen, OD
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Photovoltaics for Buildings Cutting-Edge PV

Description: Photovoltaic (PV) technology development for building-integrated applications (commonly called PV for Buildings) is one of the fastest growing areas in the PV industry. Buildings represent a huge potential market for photovoltaics because they consume approximately two-thirds of the electricity consumed in the US. The PV and buildings industries are beginning to work together to address issues including building codes and standards, integration, after-market servicing, education, and building e… more
Date: November 5, 1998
Creator: Hayter, S. J. & Martin, R. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Russia-U.S. Joint Program on the Safe Management of Nuclear Materials: Approaches to Prioritizing the Lab to Lab Project

Description: The U.S. and Russian weapons dismantlement process is producing hundreds of tons of excess plutonium (Pu) and highly enriched uranium (HEU) fissile materials. The nuclear operations associated with the final disposition of these materials will be occurring in both countries for decades. A significant accident during these operations could delay the disposition process. Russia- U.S. collaborative efforts to address safety issues associated with disposition processes have been ongoing since 1993.… more
Date: November 5, 1998
Creator: Carlson, D. & Young, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

On Theories for Reacting Immiscible Mixtures

Description: On some small scale each constituent of an immiscible mixture occupies a separate region of space. Given sufficient time and computing power, we could solve the continuum field equations and boundary conditions for this het erogenous system. This usually represents an enormously difficult task that is well beyond today's computational ca- pabilities. Mixture theories approximate this complex heterogeneous formulation with a set of field equations for an equivalent homoge- neous mat erial. In th… more
Date: November 5, 1998
Creator: Drumheller, D.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

327 to 324 Pin tube shipment quality management process plan

Description: The B and W Hanford Company's (BWHC) 327 Facility, in the 300 Area of the Hanford Site, is preparing to ship five Pin Tubes to the 324 Facility for storage and eventual disposition. The Pin Tubes consist of legacy fuel pin pieces and drillings. They will be over-packed in new Pin Tubes and transported to 324 in three shipments. Once received at 324, two of the shipments will be combined for storage as a fissionable material batch, and the other shipment will be added to an existing batch.
Date: November 5, 1998
Creator: HAM, J.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Appropriations for FY1999: District of Columbia

Description: Appropriations are one part of a complex federal budget process that includes budget resolutions, appropriations (regular, supplemental, and continuing) bills, rescissions, and budget reconciliation bills. This report is a guide to one of the 13 regular appropriations bills that Congress passes each year. It is designed to supplement the information provided by the House and Senate Appropriations Subcommittees on the District of Columbia.
Date: November 5, 1998
Creator: Noto, Nonna A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

[Endorsement for Marcus Fellowship Admission]

Description: An impactful letter endorsing the exceptional qualities and potential of a fellowship applicant, advocating for their acceptance into the esteemed Marcus Fellows Program at the School of Visual Arts, University of North Texas (UNT).
Date: November 5, 1998
Item Type: Refine your search to only Letter
Partner: UNT Libraries Special Collections
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