573 Matching Results

Search Results

The Site B Foundry (Final Report on Part I of P.A. No. 151-ML-54-2, F.S. 41)

Description: The Site B Foundry is equipped for the melting and casting of tuballoy and its alloys. Castings weighing up to 750 pounds and as long as 40 inches can be made. Melting can be carried out in the vacuum, in inert gases or under fluxes. Heating is by high frequency induction. A description of the generally foundry layout, the furnace construction and operation, and of the auxiliary equipment is given in this report. The casting technique used in the Site B Foundry is designed to minimize piping and cold shuts in the billets. The top of the mold is kept hot and freezing of the billet takes place from the bottom. This hot topping minimizes piping. Controlled pouring into warm molds minimized cold shuts.
Date: February 12, 1945
Creator: Lauletta, Paul
Partner: UNT Libraries Government Documents Department

VACUUM CASTING OF ALUMINUM-SILICON COATING ON TUBALLOY URANIUM . Final Report on a part of P.A. No. 390-ML-54-S F.S. 17

Description: Welding is used to fabricate titanium and titanium-alloy components for air-frames, Jet engines, missiles, and chemical equipment. Annong the most important considerations in adapting titanium and its alloys to welded components is to use proper welding procedures and to select alloys that have the required weld-joint properties. The chemical and metallurgical characteristics that affect the selection of welding processes and alloys are discussed. Also, information is presented on surface preparation, welding procedures, and quality control. In addition, detailed data on the mechanical properties of welded joints in the commercial grades of titanium and titanium alloys and how these properties are affected by heat treatment and elevated temperatures are presented. (auth)
Date: March 23, 1945
Creator: Schwartz, D.L. & Kurland, L.
Partner: UNT Libraries Government Documents Department

Casting Uranium Bars as a Substitute for the Extrusion Process

Description: The usual method of producing uranium slugs for the reaction pile is to cast the metal into billets which are extruded into rod about 1.45 inches in diameter. Slugs are then machined from this to the final size of 1.359 inches in diameter by 8 inches long. Extrusion is done in the gamma range at a temperature of about 1000 C, where the metal is soft enough to be extruded at relatively low pressures. This operation is difficult and expensive and the product is not entirely satisfactory. The billets must be protected from oxidation during heating and extruding and the extruded rod must likewise be protected during cooling. Loss of metal due to oxidation is appreciable and a relatively large amount of scrap is produced. The production of dies suitable for use at the high temperatures involved is troublesome. The extruded rod must be straightened before machining and frequently contains stringers of oxide and voids or other internal defects.
Date: January 1, 1945
Creator: Lindlief, W. Earl
Partner: UNT Libraries Government Documents Department

The Direct Pouring of Liquid Metal from the Reduction Bomb

Description: By the time regular crude biscuit production was interrupted at Ames on November 9, 1944, we had made well over 100 special experimental castings by pouring the liquid metal directly from the bomb. The workmen on the regular crude production line were alternating these special castings with the regular runs without the assistance of the research group. The process had reached a state of development 'wherein the castings were made by pouring batches of about 135 pounds of liquid metal directly from the bomb into a water-cooled steel mold in the presence of air at atmospheric pressure. The pouring operation was effected through a mechanically operated valve in the bottom of the bomb. The workability of such a process has been well established, and the quality of the metal has been proved through candling and chemical tests. The first sixty billets produced by this method have been extruded successfully. A number of changes, designed to improve the quality and yield of the product and to simplify the process, have been made since producing the metal for these tests. The first set-up to test the possibility of pouring the metal directly from the bomb was made on a small scale here last spring. The fortunate success of that first trial, although made with a valve mechanism that failed repeatedly to pour in the next few runs, pointed definitely to the feasibility of such a process. The development of a practicable set-up and procedure was then undertaken, and the plan of experimentation was to make a run, closely observe the operation, and inspect the complete set-up afterwards. Observations in each case led to changes that were made for the following trials. This method of development was slow at first, but, after an acquantance was gained with the main factors involved, the developments ...
Date: March 9, 1945
Creator: Wilhelm, H. A.
Partner: UNT Libraries Government Documents Department

Manual of Fire-Loss Prevention of the Federal Fire Council

Description: From preface: This issue of the Manual of Fire-Loss Prevention, the first edition of which was published in 1934, includes revisions and additions made in part to cover improvements in the past 10 years in methods of preventing and controlling fires. Such methods remain dependent largely on the elimination of preventable fires and abatement of loss from those that originate, by the use of appropriate designs and materials in building construction and the installation of applicable fire alarm and extinguishing equipment, to the extent justified by the hazard.
Date: 1945
Partner: UNT Libraries Government Documents Department

HIGH VOLTAGE RECTIFICATION

Description: No Description Available.
Date: April 13, 1945
Creator: Nelson, W.H.
Partner: UNT Libraries Government Documents Department

THE URANIUM-MOLYBDENUM BINARY SYSTEM

Description: No Description Available.
Date: July 1, 1945
Creator: Ahmann, D; Snow, A I & Wilson, A S
Partner: UNT Libraries Government Documents Department