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Book Review of Uses for Depleted Uranium and Nonenergy Uses for Natural Uranium

Download or read book Review of Uses for Depleted Uranium and Nonenergy Uses for Natural Uranium written by M. S. Farkas and published by . This book was released on 1963 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Beneficial Uses of Depleted Uranium

Download or read book Beneficial Uses of Depleted Uranium written by and published by . This book was released on 1997 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Naturally occurring uranium contains 0.71 wt% 235U. In order for the uranium to be useful in most fission reactors, it must be enriched the concentration of the fissile isotope 235U must be increased. Depleted uranium (DU) is a co-product of the processing of natural uranium to produce enriched uranium, and DU has a 235U concentration of less than 0.71 wt%. In the United States, essentially all of the DU inventory is in the chemical form of uranium hexafluoride (UF6) and is stored in large cylinders above ground. If this co-product material were to be declared surplus, converted to a stable oxide form, and disposed, the costs are estimated to be several billion dollars. Only small amounts of DU have at this time been beneficially reused. The U.S. Department of Energy (DOE) has begun the Beneficial Uses of DU Project to identify large-scale uses of DU and encourage its reuse for the primary purpose of potentially reducing the cost and expediting the disposition of the DU inventory. This paper discusses the inventory of DU and its rate of increase; DU disposition options; beneficial use options; a preliminary cost analysis; and major technical, institutional, and regulatory issues to be resolved.

Book Porosity in Titanium Welds

Download or read book Porosity in Titanium Welds written by Robert Melvin Evans and published by . This book was released on 1964 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Porosity in fusion welds in titanium has been encountered to some extent in all programs using this joining method. While measures to control cleanliness and to employ good welding techniques have successfully reduced the occurrence of porosity, specific indentification of the various causes of porosity is still lacking. Some factors suspected of causing porosity in titanium welds are hydrogen, cleanliness of joint area, contamination in filler wire, and welding procedures and techniques.

Book Observations on Delayed Cracking in Welded Structures of Unalloyed Titanium Sheet

Download or read book Observations on Delayed Cracking in Welded Structures of Unalloyed Titanium Sheet written by R. H. Ernst and published by . This book was released on 1964 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: A brief study of delayed fracture in a seam-welded titanium panel is summarized in this memorandum. Examination of the fracture surface with electron microscopy showed that the material cleaved, failing in a brittle manner. Although the nature of the embrittlement was not clearly defined, titanium hydride phase was suspected as a prime contributor to failure. Even though the hydrogen content of the titanium was only 65 ppm, hydride embrittlement was thought to have occurred from precipitation of hydride platelets on crystal planes oriented normal to welding stresses. Other work, briefly discussed in the memorandum, has confirmed that hydride platelets in titanium can be oriented by stress and that tensile ductility of Zircaloy (which behaves similarly with respect to hydrogen, to titanium) depends upon hydride orientation. Stress-relief annealing of welded titanium structures is recommended wherever possible to minimize embrittlement by stress-oriented hydrides. (Author).

Book Continued Observations on the Distribution of Stress in the Vicinity of a Crack in the Center of a Plate

Download or read book Continued Observations on the Distribution of Stress in the Vicinity of a Crack in the Center of a Plate written by L. R. Jackson and published by . This book was released on 1964 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: This memorandum supplements and augments information presented in DMIC Memorandum 178 (AD-422 463). In the present report, Neuber's stress equations are rewritten entirely in rectangular coordinates. In addition, numerical results have been extended to include the stress distribution around an indefinitely sharp crack. It is also shown that the stress function used in a British work for an indefinitely sharp crack yielded identical numerical results, even though the stress function was of a different type than that employed by Neuber. The Von Mises relation was chosen to delineate the area around a crack in which plastic flow is occurring. The numerical tables in this memorandum give values for the function of plane stress as well as one possible interpretation of plane strain. Values of the hydrostatic stress variant are also given for both plane stress and plane strain. (Author).

Book The Current Status and 1970 Potential of Selected Defense Metals

Download or read book The Current Status and 1970 Potential of Selected Defense Metals written by and published by . This book was released on 1963 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Current Status of the Welding of Maraging Steels

Download or read book The Current Status of the Welding of Maraging Steels written by Robert Melvin Evans and published by . This book was released on 1963 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Uranium from Russia Inv 731 TA 539 C Second Review

Download or read book Uranium from Russia Inv 731 TA 539 C Second Review written by and published by DIANE Publishing. This book was released on with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Consideration of Steels with Over 150 000 Psi Yield Strength for Deep submergence Hulls

Download or read book Consideration of Steels with Over 150 000 Psi Yield Strength for Deep submergence Hulls written by G. K. Manning and published by . This book was released on 1963 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three types of ferrous materials that deserve to be considered as future hull materials are discussed. The present state of knowledge can be summarized this way: quenched and tempered steels with 0.20% carbon and yield strengths of about 170,000 psi can probably be developed into a useful hull material in less time than either of the other two classes. Maraging steels have great potential if it is possible to improve their toughness. This may be resolved within a few months and surely within a year. The stable austenitic steels appear to offer the greatest potential, but less is known about these than about the other two classes of materials. (Author).

Book Preparation and Properties of Fiber reinforced Structural Materials

Download or read book Preparation and Properties of Fiber reinforced Structural Materials written by D. E. Price and published by . This book was released on 1963 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metallic fibers in the form of whiskers, chopped fine wire, or wool have been incorporated into metallic matrices by two principal methods: classical powder-metallurgical methods, and infiltration of the fibers with molten matrix metal. Ceramic fibers, notably alpha-A1203, have been used as whiskers or wool for reinforcing metallic matrices, the methods of preparation of the composite being the same as with metallic fibers. When metallic fibers are used to reinforce ceramics, the ceramic is either slip cast into the fiber mat and dried, or a mixture of the fiber and ceramic is hot pressed. Plastics and elastomers are combined with fibers by several methods, for example, dipping a sintered skeleton of the fibers into liquid Teflon. Several programs have resulted in combinations which show that reinforcement of metals by either metallic or alpha-A1203 fibers is possible. Both the room-temperature and elevatedtemperature tensile properties of the composite seem to increase linearly with the volume fraction of the fiber phase. (Author).

Book Some Design Aspects of Fracture in Flat sheet Specimens and Cylindrical Pressure Vessels

Download or read book Some Design Aspects of Fracture in Flat sheet Specimens and Cylindrical Pressure Vessels written by L. R. Jackson and published by . This book was released on 1963 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of flat-sheet tensile tests made at different laboratories are re-examined and put on a comparable basis. The materials represented are 7075-T6 clad, 2024-T3 clad, 2014-T6, and 2219-T87 aluminum alloys, and 17-7PH stainless steel. Curves are presented in a form usable by designers. One investigation was concerned with the fracture strength of cylindrical pressure vessels made from 2024-T3 and 7075-T6 aluminum alloys. The data from this investigation are put on the same basis as the flat-sheet data so that comparisons can be made. Conclusions from the data studied in this memorandum are presented and suggestions for additional testing are made. (Author).

Book Production Problems Associated with Coating Refractory metal Hardware for Aerospace Vehicles

Download or read book Production Problems Associated with Coating Refractory metal Hardware for Aerospace Vehicles written by W. A. Gibeaut and published by . This book was released on 1963 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Four coating processes have been scaled up to coat components of aerospace vehicles: (1) slurry, (2) atmospheric-pressure pack cementa tion, (3) vacuum pack cementation, and (4) fluidized bed. The principal advantage of the slurry process is its ability to coat limited access areas such as the interior channels of built-up corrugated panels. This makes the process ideal for coating spot-welded corrugated panels after they have been welded. The other three coating processes, which are vapor-deposi tion processes, are not so suitable for coating limited-access areas. When they are used for parts such as built-up corrugated panels, the individual parts (including rivets) are coated, then riveted together, and then the entire assembly is recoated. This shortcoming is off set by the fact that the coatings applied by the vapor-deposition processes are more protective at higher temperatures than are the slurry coatings.

Book The Problem of Hydrogen in Steel

Download or read book The Problem of Hydrogen in Steel written by A. R. Elsea and published by . This book was released on 1963 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: This memorandum introduces the problem of delayed, brittle failures associated with hydrogen in steel, particularly high-strength steel. It is intended to help the steel user determine if he has such a problem. The effects of hydrogen on the mechanical properties of steel are dealt with, and the behavior of material susceptible to delayed, brittle failure is described. Also, the effects of such factors as strength level, magnitude of applied stress, hydrogen content, steel composition, test temperature, and strain rate on hydrogen embrittlement and the susceptibility to hydrogen-induced, delayed, brittle failure are discussed. Possible sources of hydrogen in steel and the types of tests useful in determining the susceptibility to delayed failure are outlined. (Author).