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Nitrided-steel piston rings for engines of high specific power

Description: Report presenting testing of several designs of nitrided-steel piston rings under variable conditions of output. Testing indicated the importance of good surface finish and conformity of the ring to the bore. Results regarding temperature tests, single-cylinder-engine tests, and multicylinder-engine tests are provided.
Date: April 1944
Creator: Collins, John H., Jr.; Bisson, Edmond E. & Schmiedlin, Ralph F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Friction, wear, and surface damage of metals as affected by solid surface films

Description: "As predicted by friction theory, experiments showed that friction and surface damage of metals can be reduced by solid surface films. The ability of materials to form surface films that prevent welding was a very important factor in wear of dry and boundary lubricated surfaces. Films of graphitic carbon on cast irons, NiO on nickel alloys, and FeO and Fe(sub 3)O(sub 4) on ferrous materials were found to be beneficial. Abrasive films such as Fe(sub 2)O(sub 3) or MoO(sub 3) were definitely detri… more
Date: February 10, 1955
Creator: Bisson, Edmond E.; Johnson, Robert L.; Swikert, Max A. & Godfrey, Douglas
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tensile-Strength Investigation of Cast-Iron Piston Rings of Various Strengths

Description: Report discusses an investigation into the tensile strength of cast-iron piston rings, NACA microtensile specimens, and bar specimens. Photographs showing the relation between graphite-flake size and tensile strength and radiographs showing the shrinkage cavities in the piston rings are provided. Piston rings tend to be one of the first parts of an aircraft engine to fail, so discovering the ideal material composition and foundry treatment is very important.
Date: March 1945
Creator: Bisson, Edmond E. & Kessler, Harold D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bonding of molybdenum disulfide to various materials to form a solid lubricating film 1: the bonding mechanism

Description: Report presenting the use of molybdenum disulfide as a solid film lubricant in applications where designs or temperatures preclude liquid lubricants is dependent on successful bonding of the powder to the surface to be lubricated. An investigation was conducted to determine the basic mechanism of bonding and to extend application of the bonding to a variety of materials. Results regarding an examination of electron diffraction of MoS2 dusted and rubbed on steel, adherence of dry powders to meta… more
Date: February 1952
Creator: Godfrey, Douglas & Bisson, Edmond E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effective lubrication range for steel surfaces boundary lubricated at high sliding velocities by various classes of synthetic fluids

Description: Report presenting an exploration of synthetic lubricants, which involved studying the effects of a wide range of sliding velocities on boundary lubrication. The data showed that a number of synthetics, including diesters, polyethers, a silicate ester, and a phosphonate ester as well as a silicone-diester blend are more effective boundary lubricants at high sliding velocities than comparable petroleum oils.
Date: December 1952
Creator: Johnson, Robert L.; Swikert, Max A. & Bisson, Edmond E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wear and sliding friction properties of nickel alloys suited for cages of high-temperature rolling-contact bearings 1: alloys retaining mechanical properties to 600 degrees F

Description: Report presenting a study of the wear and sliding friction properties of a number of nickel alloys operating against hardened SAE 52100 steel. The alloys included L nickel, wrought monel, cast monel, cast modified H monel, cast S monel, Invar, Ni-Resist 3, and Nichrome V.
Date: August 1952
Creator: Johnson, Robert L.; Swikert, Max A. & Bisson, Edmond E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wear and sliding friction properties of nickel alloys suited for cages of high-temperature rolling-contact bearings 2: alloys retaining mechanical properties above 600 degrees F

Description: Report presenting a study of wear and sliding friction properties of a number of nickel alloys operating against hardened SAE 52100 steel. The alloys were cast beryllium nickel, heat-treated beryllium nickel, cast Inconel, Nimonic 80, Inconel X, Refractalloy 26, and Discaloy. Results regarding the wear of unlubricated surfaces, friction of lubricated surfaces, x-ray diffraction study of wear debris, and the practical significance are provided.
Date: August 1952
Creator: Johnson, Robert L.; Swikert, Max A. & Bisson, Edmond E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of chemical reactivity of lubricant additives on friction and surface welding at high sliding velocities

Description: Report presenting an investigation of the effect of chemical reactivity of lubricant additives on friction at high sliding velocities. The investigation was conducted with a kinetic-friction apparatus consisting of an elastically restrained spherical rider specimen sliding on a rotating steel disk lubricated with cetane containing lubricant additives of different chemical reactivities. Results regarding chlorine compounds and sulfur compounds are provided.
Date: August 1950
Creator: Bisson, Edmond E.; Swikert, Max A. & Johnson, Robert L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Friction and wear of hot-pressed bearing materials containing molybdenum disulfide

Description: Report presenting an investigation to determine the feasibility of bearing lubrication by a process involving the transfer of molybdenum disulfide from within the structure of a composite bearing material to the interface between the contacting surfaces. The experiments were performed with a kinetic-friction apparatus employing a rotating steel disk and a bearing-specimen assembly suspended and restrained by metal springs.
Date: February 1950
Creator: Johnson, Robert L.; Swikert, Max A. & Bisson, Edmond E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effectiveness of molybdenum disulfide as a fretting-corrosion inhibitor

Description: Report presenting an investigation of the effectiveness of molybdenum disulfide as a fretting-corrosion inhibitor. Six methods of applying MoS2 to steel specimens was evaluated by noting the number of cycles of vibration required to produce the first evidence of fretting corrosion and by observing the nature of its occurrence. Experiments were conducted with steel balls vibrating in contact with glass flats whereby the action could be microscopically observed.
Date: September 1950
Creator: Godfrey, Douglas & Bisson, Edmond E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Friction at high sliding velocities

Description: Report presenting information that extends the range of existing fundamental friction knowledge to include sliding velocities encountered in rolling-contact bearings and reduction gears of aircraft power plants. Experiments were conducted with a kinetic-friction apparatus consisting basically of an elastically restrained spherical rider sliding on a dry or lubricated rotating disk. The results indicate that the kinetic friction decreases with sliding speed for dry and for some boundary-lubricat… more
Date: October 1947
Creator: Johnson, Robert L.; Swikert, Max A. & Bisson, Edmond E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of high bulk temperatures on boundary lubrication of steel surfaces by synthetic fluids

Description: "High operating temperatures of new and projected turbine engines require that synthetic fluids be used as lubricants, because these fluids have better thermal stability and viscosity-temperature characteristics than petroleum oils have. An experimental study was conducted to learn the effect of high lubricant bulk temperatures on the boundary lubricating effectiveness of various types of synthetic fluid" (p. 1).
Date: May 1953
Creator: Murray, S. F.; Johnson, Robert L. & Bisson, Edmond E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Friction of surface films formed by decomposition of common lubricants of several types

Description: Report presenting an investigation to determine the effect on friction of films formed on steel surfaces by decomposition of common lubricants of several types. The films were formed by heating, in air, surfaces to which a thin film of fluid lubricant had been applied. Results regarding the fluid lubricants, decomposition films, surface loading, fluid lubricant on decomposition film, and practical significance are provided.
Date: April 1950
Creator: Johnson, Robert L.; Godfrey, Douglas & Bisson, Edmond E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Bonding of molybdenum disulfide to various materials to form a solid lubricating film 2: friction and endurance characteristics of films bonded by practical methods

Description: Report exploring the use of molybdenum disulfide as a solid-film lubricant, especially in applications where designs or higher temperatures preclude liquid lubricants, because of its good frictional and thermal properties. An investigation was conducted to determine practical methods of bonding MoS2 to materials to form solid-film lubricants and friction and endurance characteristics of films so formed.
Date: October 1952
Creator: Godfrey, Douglas & Bisson, Edmond E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Friction at high sliding velocities of surfaces lubricated with sulfur as an additive

Description: Report presenting an investigation of friction occurring at high sliding velocities of sulfur-type extreme-pressure lubricants. Experimental evidence is presented that indicates the existence of a limiting and critical condition of sliding velocity. Results regarding the effect of sliding velocity for initial hertz stress of 126,000 pounds per square inch and effect of sliding velocity for variable loads are provided.
Date: October 1948
Creator: Johnson, Robert L.; Swikert, Max A. & Bisson, Edmond E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Friction of solid films on steel at high sliding velocities

Description: Report presenting an investigation to identify the roles of solid-surface films in the mechanisms of sliding and lubrication involved in the mating and compatibility of boundary-lubricated slider surfaces, in the action of extreme-pressure lubricants, and in the operation of slider surfaces not supplied with fluid lubricants. Results regarding the films formed during run-in, films formed by extreme-pressure lubricants, and supplemental or dry-lubrication films are provided.
Date: April 1948
Creator: Johnson, Robert L.; Godfrey, Douglas & Bisson, Edmond E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrited-Steel Piston Rings for Engines of High Specific Power

Description: "Several designs of nitrided-steel piston rings were performance-tested under variable conditions of output. The necessity of good surface finish and conformity of the ring to the bore was indicated in the preliminary tests. Nitrided-steel rings of the same dimensions as cast-iron rings operating on the original piston were unsatisfactory, and the final design was a lighter, rectangular, thin-face-width ring used on a piston having a maximum cross-head area and a revised skirt shape. Results we… more
Date: April 1, 1944
Creator: Collins, John H., Jr.; Bisson, Edmond E. & Schmiedlin, Ralph F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Investigation of wear and friction properties under sliding conditions of some materials suitable for cages of rolling-contact bearings

Description: "An investigation of wear and friction properties of a number of materials sliding against SAE 52100 steel was conducted. These materials included brass, bronze, beryllium copper, monel, nichrome v, 24S-T aluminum, nodular iron, and gray cast iron. The metals investigated may be useful as possible cage (separator or retainer) materials for rolling-contact bearings of high-speed turbine engines. The ability of materials to form surface films that prevent welding is a most important factor in bot… more
Date: March 26, 1951
Creator: Johnson, Robert L.; Swikert, Max A. & Bisson, Edmond E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of a Silicone-Diester Lubricant in Bench Studies and in a Turbopropeller Engine

Description: Report presenting an investigation of a silicone-diester blend (SD-17) in various bench studies and in a turbopropeller engine to determine its suitability as a lubricant for aircraft engines. The performance of the fluid was satisfactory during more than 17 hours of operation in a T-38 engine with power levels from 1745 to 2400 horsepower. Results regarding bench studies and turbopropeller engine study are provided.
Date: May 4, 1954
Creator: Johnson, Robert L.; Murray, S. F. & Bisson, Edmond E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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