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Overview of a Welding Development Program for a Ni-Cr-Mo-Gd Alloy

Description: The National Spent Nuclear Fuel Program (NSNFP), located at the Idaho National Laboratory, coordinates and integrates management and disposal of U.S. Department of Energy-owned spent nuclear fuel. These management functions include using the DOE standardized canister for packaging, storage, treatment, transport, and long-term disposal in the Yucca Mountain Repository. Nuclear criticality must be prevented in the postulated event where a waste package is breached and water (neutron moderator) is… more
Date: June 1, 2007
Creator: Hurt, W. L.; Mizia, R. E. & Clark, D. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Properties and Weldability of Materials for Fusion Reactor Applications

Description: Low-activation austenitic stainless steels have been suggested for applications within fusion reactors. The use of these nickel-free steels will help to reduce the radioactive waste management problem after service. one requirement for such steels is the ability to obtain sound welds for fabrication purposes. Thus, two austenitic Fe-Cr-Mn alloys were studied to characterize the welded microstructure and mechanical properties. The two steels investigated were a Russian steel (Fe-11.6Cr19.3Mn-0.1… more
Date: November 15, 1991
Creator: Chin, B. A.; Kee, C. K.; Wilcox, R. C. & Zinkle, S. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Low-mass, intrinsically-hard high-temperature radiator. Final report, Phase I

Description: Thermacore, Inc. of Lancaster, Pennsylvania has completed a Phase I SBIR program to investigate the use of layered ceramic/metal composites in the design of low-mass hardened radiators for space heat rejection systems. The program is being monitored by the Los Alamos National Laboratory (LANL) for the Strategic Defense Initiative Organization (SDIO). This effort evaluated the use of layered composites as a material to form thin-walled, vacuum leaktight heat pipes. The heat pipes would be incorp… more
Date: June 15, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of Metallic Filters for Hot Gas Cleanup in Pressurized Fluidized Bed Combustion Applications

Description: Alternative alloys derived from the wide array of aerospace superalloys will be developed for hot gas filtration to improve on both ceramic filters and ''first-generation'' iron aluminide metallic filter materials. New high performance metallic filters should offer the benefits of non-brittle mechanical behavior at all temperatures, including ambient temperature, and improved resistance to thermal fatigue compared to ceramic filter elements, thus improving filter reliability. A new powder proce… more
Date: September 19, 2002
Creator: Anderson, Iver E.; Gleeson, Brain & Terpstra, Robert L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Selection of barrier metals for a waste package in tuff

Description: The Nevada Nuclear Waste Storage Investigation (NNWSI) project under the Civilian Radioactive Waste Management Program is planning a repository at Yucca Mountain at the Nevada Test Site for isolation of high-level nuclear waste. LLNL is developing designs for an engineered barrier system containing several barriers such as the waste form, a canister and/or an overpack, packing, and near field host rock. The selection of metal containment barriers is addressed. 13 references.
Date: September 1, 1983
Creator: Russell, E.W.; McCright, R.D. & O`Neal, W.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Grain Growth Behavior, Tensile Impact Ductility, and Weldability of Cerium-Doped Iridium Alloys

Description: An iridium alloy doped with small amounts of cerium and thorium is being developed as a potential replacement for the iridium-based DOP-26 alloy (doped with thorium only) that is currently used by the National Aeronautics and Space Administration (NASA) for cladding and post-impact containment of the radioactive fuel in radioisotope thermoelectric generator (RTG) heat sources which provide electric power for interplanetary spacecraft. This report summarizes results of studies conducted to date … more
Date: May 28, 2002
Creator: McKamey, C.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Weldability of general purpose heat source new-process iridium

Description: Weldability tests on General Purpose Heat Source (GPHS) iridium capsules showed that a new iridium fabrication process reduced susceptibility to underbead cracking. Seventeen capsules were welded (a total of 255 welds) in four categories and the number of cracks in each weld was measured.
Date: January 1, 1987
Creator: Kanne, W.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Survey of degradation modes of candidate materials for high-level radioactive-waste disposal containers; Overview

Description: Three iron- to nickel-based austenitic alloys and three copper-based alloys are being considered as candidate materials for the fabrication of high-level radioactive-waste disposal containers. The austenitic alloys are Types 304L and 316L stainless steels and the high-nickel material Alloy 825. The copper-based alloys are CDA 102 (oxygen-free copper), CDA 613 (Cu-7Al), and CDA 715 (Cu-30Ni). Waste in the forms of both spent fuel assemblies from reactors and borosilicate glass will be sent to th… more
Date: June 1, 1988
Creator: Farmer, J.C.; McCright, R.D. & Kass, J.N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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General purpose heat source (GPHS) clad vent set (CVS) formability study

Description: Primarily, Mound was to evaluate both improved-iridium and standard-flight iridium blanks with respect to current GPHS-CVS manufacturing processes and provide example-weld-quality CVS to the Savannah River Plant (SRP) for its weldability study. Additionally, Mound's practice of performing a final outgassing (1500/sup 0/C for 1 hr) of CVS was evaluated with respect to metallurgical properties of iridium cups and electron-beam (EB) welding characteristics of CVS subassembly components.
Date: November 3, 1986
Creator: Forrest, M. A.; McDougal, J. R. & Saylor, R. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of small additions of niobium on the welding behavior of an austenitic stainless steel

Description: To systematically study the effect of niobium on the behavior of Type 304 stainless steel, a low-niobium commercial heat was remelted with varying niobium additions - up to 1000 ppM. A standardized weldability test, the Spot Varestraint, was used to compare the propensity of various heats for hot cracking. The fusion and heat-affected zone cracking behavior of the experimental heats was similar to that of a heat of commercial Type 304, and much superior to that of a commercial heat of Type 347 … more
Date: January 1, 1977
Creator: Moorhead, A. J.; Sikka, V. K. & Reed, R. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Weldability of general purpose heat source iridium capsules

Description: Two weldability tests developed by ORNL for plate material have been demonstrated on iridium (Goodwin 1987 and David 1987), but neither test is applicable to underbead cracking in a capsule configuration. As a result of underbead cracking of welded iridium capsules at SRP, a weldability test was designed and demonstrated on capsules to measure the susceptibility of different batches of iridium to underbead cracking. The capsule weldability test and its use to determine the relative weldability … more
Date: January 1, 1988
Creator: Kanne, W. R., Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electron-beam welding of thorium-doped iridium alloy sheets. [Ir--0. 3% W 200 ppM Th-50 ppM Al]

Description: Modified iridium alloys containing 100 ppM Th were found to be very susceptible to hot-cracking during gas tungsten-arc and electron-beam welding. However, the electron-beam welding process showed greater promise of success in welding these alloys, in particular Ir--0.3% W doped with 200 ppM Th and 50 ppM Al. The weldability of this particular alloy was extremely sensitive to the welding parameters, such as beam focus condition and welding speed, and the resulting fusion zone structure. At low … more
Date: April 1, 1979
Creator: David, S.A.; Liu, C.T. & Hudson, J.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Weldability of thermally grain-refined Fe-12Ni-0. 25Ti for cryogenic structural applications

Description: The weldability of a research alloy designed for structural use in liquid helium temperature, cryogenic environments was investigated. Plates of iron-12 weight percent nickel-0.25 weight percent titanium were grain refined by the four-step, grain refining thermal treatment developed for this alloy and welded with Inconel Number 92 weld wire using the Gas Metal Arc (GMA) welding process with argon-15% helium gas shielding. Both a single pass and a double-sided, 2 pass electron beam (EB) weld wer… more
Date: February 1, 1980
Creator: Williams, D.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Double-wall steam-generator tube and weld-development study. [LMFBR]

Description: The objective of this effort was to evaluate and initiate development on double-wall tubing and tube/tubesheet welds of various configurations for application in LMFBR steam generators. The scope of this effort was limited to one material (2 1/4 Cr-1Mo), two T/TS weld types (IBW and Orbital) and relatively small tube dimensions (approx. CRBR reference steam generator). It was recognized that larger tubes are, in general, easier to weld and that other combinations of tube materials (Incoloy 800,… more
Date: February 1, 1976
Creator: Krankota, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Cladding of pressure vessel steels for coal conversion applications: a literature review

Description: The available literature is reviewed concerning corrosion-resistant lining of large ferritic steel vessels and piping, applicable to coal gasification and liquefaction systems. Potential ferritic steel pressure vessel and piping materials are discussed along with potential stainless steel and nickel-base cladding materials. The various lining techniques currently used in the United States and abroad are also reviewed, with advantages and disadvantages of each. Materials problems with the variou… more
Date: September 1, 1978
Creator: Edmonds, D. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Beryllium weldability

Description: Welding processes and metallurgical considerations for beryllium welding are discussed in this review. The primary difficulties of welding beryllium are hot cracking, cracking at defects, and ductility limitation or thermally induced cracking. Solutions to these welding problems include control of the Fe/Al ratio in the base metal to reduce hot cracking, minimization of the BeO content and starting grain size to limit cracking at defects and ductility limitation cracking, and optimization of th… more
Date: January 1, 1990
Creator: Hill, M.A.; Damkroger, B.K.; Dixon, R.D. (Los Alamos National Lab., NM (USA)) & Robertson, E. (Air Force Office of Scientific Research, Washington, DC (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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