摘要:

The objective of this work was to develop oils of maximum radiation stability from readily available ingredients. Lubricants in three viscosity grades were made with alkylbenzenes containing selected polymers and additives. Each new oil was subjected to standard tests to determine if it met the specifications for presently used products made from mineral oils. The special oils complied with most requirements, and shortcomings were generally correctable. Both the special and conventional oils were irradiated under water in the Canal Gamma Source at the Materials Testing Reactor (MTR) in Idaho. Most conventional oils were damaged beyond usefulness at 10×108roentgens (r). The alkylbenzene fluids still retained lubricating qualities after 50 to 70×108r and remained fluid well above 100×108r. These results prove the feasibility of making radiation resistant lubricants by this new approach.Presented as an American Society of Lubrication Engineers paper at the Lubrication Conference held in Los Angeles, Calif., October 1958.

ISSN:0569-8197    

DOI:10.1080/05698195908972351

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

Representative turbine oils and turbine oil components were exposed to electron radiation and evaluated for radiation-induced changes in functional characteristics. The irradiated oils were examined by numerous laboratory techniques including those established by the ASTM Committee C on Turbine Oils. As a result of exposure to radiation, changes were noted in turbine oil viscosity, oxidation stability, rust resistance, foaming susceptibility, color and other properties.Presented as an American Society of Lubrication Engineers paper at the Lubrication Conference held in Los Angeles, Calif., October, 1958.

ISSN:0569-8197    

DOI:10.1080/05698195908972352

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

Presented as an American Society of Lubrication Engineers paper at the Lubrication Conference held in Los Angeles, Calif., October 1958.

ISSN:0569-8197    

DOI:10.1080/05698195908972353

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

Presented as an American Society of Lubrication Engineers paper at the Lubrication Conference held in Los Angeles, Calif., October, 1958.

ISSN:0569-8197    

DOI:10.1080/05698195908972354

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

The load-life and friction characteristics of sleeve-bearing materials have been determined under conditions simulating airframe operation. The bearings were grease lubricated, and operation was oscillatory (±45-degree amplitude). All bearing evaluations were conducted at room temperature. Design charts relating bearing load and wear to life in terms of cycles of oscillation were constructed from the data. Frictional characteristics were also studied. Aluminum bronze was found satisfactory as a bearing material when used with hardened SAE 4340 steel shafts for loads up to 15,000 psi. Steady-state load conditions were found more severe than reversing-load conditions.Presented as an American Society of Lubrication Engineers paper at the Lubrication Conference held in Los Angeles, Calif., October, 1958.

ISSN:0569-8197    

DOI:10.1080/05698195908972355

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

Recent studies of adhesion between metals measured as a function of pressure, temperature and time have resulted in a quantitative understanding of the process. Creep causes the spaces between the point contacts to be filled in and molecular seizure occurs.

ISSN:0569-8197    

DOI:10.1080/05698195908972356

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

A pin-on-disk type of apparatus is used to study the effect of operating variables on transition temperatures with dilute solutions of pure fatty acids in pure paraffinic hydrocarbons and with a straight paraffinic mineral oil. It is found that the temperature at which the sudden transition from low to high friction and wear occurs increases with sliding speed, decreases with load, and is otherwise independent of operating variables. Empirically, the reciprocal of the absolute transition temperature varies linearly with the logarithm of the ratio of load to speed. The absence of conventional hydrodynamic lubrication in this system is demonstrated.

ISSN:0569-8197    

DOI:10.1080/05698195908972357

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

Wear and friction behavior of slider materials at cryogenic temperature is important to the development of seals and bearings for missile powerplants. Data were obtained in liquid nitrogen (−320°F) with a series of molded and extruded polytetrafluoroethylene (PTFE) compositions containing various filler materials. A3/16-in. radius rider specimen (PTFE materials) was caused to slide in a circumferential path on the flat surface of a rotating2½-in. diameter disk specimen (usually type 304 stainless steel). The sliding velocity was usually 2300 ft per min and the load was 1000 grams.

ISSN:0569-8197    

DOI:10.1080/05698195908972358

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

Presented as an American Society of Lubrication Engineers paper at the Lubrication Conference held in Los Angles, Calif., October, 1958.

ISSN:0569-8197    

DOI:10.1080/05698195908972359

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

It is shown that the operation of engines on crankcase oils containing appreciable amounts of zinc dialkyl dithiophosphate can increase the small-scale roughness of the lifter-foot surfaces. In addition, the small-scale roughness can be reduced by subsequent operation of the same engine parts on oils containing no zinc dialkyl dithiophosphate. This change in roughness coincides with a change in reflectivity that can be detected visually.

ISSN:0569-8197    

DOI:10.1080/05698195908972360

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor