60 Matching Results

Search Results

Results: 1 - 24 next
open access

Effect of heat treatment upon the microstructure and hardness of a wrought cobalt-base alloy stellite 21 (AMS 5385)

Description: Report presenting an investigation of the response of wrought Stellite 21, a typical cobalt-base alloy, to heat treatment. The alloy was solution-treated and transformed by aging and isothermal transformation at temperatures of 1200 to 1950 degrees Fahrenheit for periods of 5 minutes to 72 hours. Results regarding the solution-treated structure, precipitation by isothermal transformation, precipitation by aging, grain boundary behavior, and hardness are provided.
Date: March 1954
Creator: Clauss, F. J. & Weeton, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fabrication and Properties of Extruded Silver-Cadmium Control Rods

Description: The production of cross-type control rods having a span of 4- 7/8 in., and an arm thickness of 1/8/ in., was studied. Extrusion techniques were developed for producing crosstype control rods from each of two alloys; one containing 75% silver-25% cadmium, and the other containing 67% silver-30% cadmium-3% copper. Fabrication of the extruded crosses into clad control rods for the Mark I naval reactor was attempted. A set of unclad control rods for the Zero Power Reactor was produced. The effect o… more
Date: January 1, 1954
Creator: Dwight, A. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Coefficient of friction and damage to contact area during the early stages of fretting 2: steel, iron, iron oxide, and glass combinations

Description: Report presenting experiments to study the start of fretting and cause of damage during the early stages of fretting of steel-steel combinations at a frequency 5 cycles per minute, an amplitude of 0.006 inch, a load of 150 grams, in air with relative humidity of less than 10 percent. Pure iron, glass, and iron oxide powder compacts were used in supplementary experiments.
Date: April 1954
Creator: Bailey, John M. & Godfrey, Douglas
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Relation of microstructure to high-temperature properties of a wrought cobalt-base alloy Stellite 21 (AMS 5385)

Description: Report presenting an investigation to determine the effects of microstructure on the stress-rupture life of heat-treated wrought Stellite 21 under stress and temperature conditions comparable to those encountered during engine operation of turbine blades and to correlate with other microstructure properties. Results regarding the stress-rupture life, elongation, hardness, metallographic examination, and room-temperature tensile tests are provided.
Date: March 1954
Creator: Clauss, F. J. & Weeton, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Trends of Rolling-Contact Bearings as Applied to Aircraft Gas-Turbine Engines

Description: Note presenting a review of the present and future trends of rolling-contact bearings for aircraft gas-turbine engines, which indicates that while rolling-contact bearings are satisfactory for present production engines, new bearings for future, higher output aircraft engines require more development. These new engines have operating conditions resulting in two primary problems: cage materials and endurance of materials for raceways and rolling elements.
Date: April 1954
Creator: Panel on High-Speed Rolling-Contact Bearings
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of Alloys for Vacuum Brazing of Sintered Wrought Molybdenum for Elevated-Temperature Applications

Description: Note describing the preparation and evaluation of 25 binary and ternary alloys with liquidus temperatures in the range of 2000 to 2500 degrees Fahrenheit as part of an investigation of potential brazing alloys for molybdenum for use at elevated temperatures. Three commercial alloys were also investigated.
Date: May 1954
Creator: Dike, Kenneth C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High-Temperature Lubricants and Bearings for Aircraft Turbine Engine

Description: Memorandum presenting a consideration of the problems, research status, and future possibilities for high-temperature lubricants and bearings for aircraft turbine engines. The greater heat loads imposed by high-performance engines and practical limitation on cooling will result in increased operating temperatures for bearings and lubricants.
Date: July 19, 1954
Creator: NACA Subcommittee on Lubrication and Wear
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparison of performance of experimental and conventional cage designs and materials for 75-millimeter-bore cylindrical roller bearings at high speed

Description: From Summary: "The results of two investigations, one to determine the relative merits of four experimental and two conventional design 75-millimeter-bore (size 215) cylindrical roller bearings and one to determine the relative merits of nodular iron and bronze as cage materials for this size and type of bearing, are presented in this report. Nine test bearings were operated over a range of dn values (product of bearing bore in mm and shaft speed in r.p.m) from 0.3 x 10(6) to 2.3 x 20(6), radia… more
Date: June 30, 1954
Creator: Anderson, William J.; Macks, E. Fred & Nemeth, Zolton N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Influence of a Precipitation Hardening Heat Treatment on the Hardness of Several Uranium-Molybdenum Alloys

Description: Four uranium alloys containing nominally 0.5, 1.0, 1.5, and 2.0 w/o molybdenum were investigated with respect to their response to hardening by heat treatment. The several alloys were heated at elevated temperatures to secure solid solution, then quenched and reheated at lower temperatures to obtain hardening. The procedure followed the well known industrial practice of solution treatment and precipitation hardening. The results showed that all the alloys could be hardened by a suitable heat tr… more
Date: August 1954
Creator: Jones, T. I.; Hoffman, C. G.; Taub, J. M.; Doll, D. T. & Montoya, F. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Investigation of nickel-aluminum alloys containing from 14 to 34 percent aluminum

Description: Report presenting an investigation of nickel-aluminum alloys which were from 14 to 34 percent aluminum by weight as part of a study of the properties of intermetallics. Results regarding the quality of castings, physical evaluation of cast alloys, hot formability of alloys, physical properties of 17.5-percent-aluminum alloy, microstructure of 17.5-percent-aluminum alloy, the casting method, and other properties of the intermetallics are provided.
Date: August 1954
Creator: Maxwell, W. A. & Grala, E. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mechanical Properties at Room Temperature of Four Cermets of Tungsten Carbide with Cobalt Binder

Description: "Room-temperature stress-strain curves are presented for compression, tension, and shear loadings on four compositions of tungsten carbide with cobalt binder. Values of modulus of elasticity, modulus of rigidity, Poisson's ratio in the elastic region, ultimate strength, density, and hardness for the four materials are tabulated" (p. 1).
Date: December 1954
Creator: Johnson, Aldie E., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Quarterly progress report - metallurgy unit - April 1954--June 1954

Description: Four irradiated tensile specimens were tested in the Radiometallurgy laboratory. The uranium was from a lot rolled at Simonds Saw and STeel Company, then beta heat treated by the triple dip process. The samples were irradiated to 310 MWD/AT. The corrected exposure was 620 MWD/T after compensating for the decrease in flux depression due to the specimen size. Two of the irradiated specimens were tested in the as-received condition while the other two were vacuum annealed at 400{degree}C for 15 ho… more
Date: July 16, 1954
Creator: Cadwell, J.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Further Studies of the Mechanism by Which Hydrogen Enters Metals During Chemical and Electrochemical Processing

Description: Note presenting studies of the entry of hydrogen into metals from chemical and electrochemical action, which occurs when hydrogen-metal alloy formation is simultaneous with discharge (or release) of hydrogen atoms. Results of some new experimental investigations and some correlations with other studies are provided.
Date: March 1954
Creator: McGraw, L. D.; Ditmars, W. E.; Snavely, C. A. & Faust, C. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Friction of possible solid lubricants with various crystal structures

Description: Report presenting a number of possible solid lubricants with various crystal structures tested in a low-speed, high-load, friction apparatus under conditions of continuous sliding. None of the solids tested were as effective as MoS2 but were at least as effective as zinc stearate and graphite in these tests. Results regarding common lubricants, layer-lattice structure, and low-shear-strength solids without layer-lattice structure are provided.
Date: December 1954
Creator: Peterson, Marshall B. & Johnson, Robert L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of chemically active additives on boundary lubrication of steel by silicones

Description: Report presenting an investigation of a method of improving the lubricating quality of silicones by providing chemically active additives. The conventional additives were not effective, but more active materials like peroxide did provide effective lubrication.
Date: August 1954
Creator: Murray, S. F. & Johnson, Robert L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Further Investigation of the Effect of Surface Finish on Fatigue Properties at Elevated Temperatures

Description: Note presenting an investigation to evaluate the effects of surface roughness on fatigue properties of low-carbon N-155 alloy with a grain size of ASTM 6 and of S-816 alloy with a grain size of ASTM 6 to 7. Fatigue studies were conducted at 80, 1200, 1350, and 1500 degrees Fahrenheit. Results regarding those fatigue tests and the surface investigation are provided.
Date: March 1954
Creator: Ferguson, Robert L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen