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Twelfth annual review of materials of construction
VOL
2 (1958/59)
SYSTEMATIC ABSTRACTS
hydrostatically. It is driven by twin tangential fluid jets. The designeliminates vibration, belt pull and radial loads. Slipper Bea+ings and Vibration Control in Small Gas Turbines. H. C. Hill. A.S&fE, Transactions, V. go, no. 8, Nov. 19.58, p. 17561764. Several new principles of bearing design proved effective in improving the reliability and smoothness of small gas turbines. The key development is the tilting-slipper thrust bearing which not only provided important radial clearance, but also made possible higher syeeds at higher thrust loads. One of the unique features considered important for performancc and low production costs is that the slippers float in then retainers instead of having fixed pivots. Static and Dynamic Characteristics of Compensated Gas Bearings. Herbert H. Richardson, ASME. Transactions, v. 80, no. 7, Oct. 1958, p. 1503-1509. A comparison is made between two common types of hydrostatic gas bearings-the pool bearing and the inherently compensated bearing-and a design example for a specific bearing requirement is worked. 5.IvkAR
AND
Twelfth Annual Review of Materials of Con* struction. Industrial and Engineering Chsmistvy, Y. 50, Sept. 195X. pt. 2, p. i.+z6-r4g8. Characteristics and uses of Al alloys, ceramics, elastomers, fibers, Pb and its alloys, less common metals, Ni, including high-nickel alloys, Plastics, protective coatings, stainless steels including other ferrous alloys, tin and its alloys, Ti, and wood. Future Metals. H. R. Ogden. Chemical Eagineeving Progress, v. 54, Nov. 1958, p. 54-57. Tungsten, tantalum, molybdenum, chromium, vanadium, niobium, and rhenium appear to have the best potentialities for extending the limits of present-day materials of construction. Each of these metals has attractive proPerties such as good strength at high temperatures and/or corrosion resistance, which make them suitable for use in the fields of chemical equipment, high-temperature jet engines, rocket motors, high math number airframes, and missiles, and other specialized applications. Less Common Met&. E. M. Sherwood. IndusCial and Eagineeving Chemistry, v. 50, Sept. 1958, p. 2, p. 1455-x459. Reactive metals can be made more resistant
409
Air-Lubricated Bearings for HighSpeed Motors and Turbines. (in Russian) S. A. Sheinberg and A. M. Kharitonov. Vestnik Mashinostroeniirs, v. 38, no. 9, Sept. 1958. p. r4-17. Description of a high-speed motor with airlubricated bearings successfully tested in laboratory and industrial conditions, in the latter as an internal grinding head. The head assures high-quality grinding and high efficiency. Design and manufacturing details. 4~2,
Gears and Seals
The Casting and Heat Treating of Steel Gears. J. M. Calkins and Victor E. Zang. M&Z Treating, v. 9, no. 5, Sept.-&t. 1958, p. IZ + I page. The choice of material and type of heat treatment to be used in the processing of cast steel gears depends largely on the ultimate use of the gear and the allowable cost of the part. Recent Research on Hydraulic Seals. I). F. Denny. Scientific Lubricalion, Y. IO, Sept. 1958, p. 12-17. A consideration of the problems of sealing in the lubrication of bearings of turbine shafts.
WEARRESISTANCE
to high temperature oxidation by alloying and the development of impervious, welibonded protective surface coatings. The best progress has been made in protective coatings for MO. The most promising work with Nb has been based on alloying. Special alloys of Zr, Ta, and Nb have been developed for the somewhat unusual corrosive and other inimical conditions prevalent in nuclear reactors. The Wear of Metals. J. F. Archard. Scientific Lubrication, Y. IO, Nov. 1958. p. 16-21. General explanation of wear phenomena. USC of radioactive tracers, Relations between wear rate and load. Plastics for Nose Cones. Irving Gruntfest. SAE JournaZ. v. 66, Nov. 1958. P. F-73. Plastics for nose cones and other parts of hypersonic vehicles are feasible because plastics decompose slowly. In this respect organic plastics may be more advantageous than metals. Investigation of Ceramic Materials in a Laboratory Rocket Motor. J. F. Lynch, J. F. Quirk, and W. H. Duckworth. American Ceramic Society Bulletin. v. 37, Oct. r95g, P. 443-445. Thirty-four different ceramic materials were
2 (1958/59)
SYSTEMATIC ABSTRACTS
hydrostatically. It is driven by twin tangential fluid jets. The designeliminates vibration, belt pull and radial loads. Slipper Bea+ings and Vibration Control in Small Gas Turbines. H. C. Hill. A.S&fE, Transactions, V. go, no. 8, Nov. 19.58, p. 17561764. Several new principles of bearing design proved effective in improving the reliability and smoothness of small gas turbines. The key development is the tilting-slipper thrust bearing which not only provided important radial clearance, but also made possible higher syeeds at higher thrust loads. One of the unique features considered important for performancc and low production costs is that the slippers float in then retainers instead of having fixed pivots. Static and Dynamic Characteristics of Compensated Gas Bearings. Herbert H. Richardson, ASME. Transactions, v. 80, no. 7, Oct. 1958, p. 1503-1509. A comparison is made between two common types of hydrostatic gas bearings-the pool bearing and the inherently compensated bearing-and a design example for a specific bearing requirement is worked. 5.IvkAR
AND
Twelfth Annual Review of Materials of Con* struction. Industrial and Engineering Chsmistvy, Y. 50, Sept. 195X. pt. 2, p. i.+z6-r4g8. Characteristics and uses of Al alloys, ceramics, elastomers, fibers, Pb and its alloys, less common metals, Ni, including high-nickel alloys, Plastics, protective coatings, stainless steels including other ferrous alloys, tin and its alloys, Ti, and wood. Future Metals. H. R. Ogden. Chemical Eagineeving Progress, v. 54, Nov. 1958, p. 54-57. Tungsten, tantalum, molybdenum, chromium, vanadium, niobium, and rhenium appear to have the best potentialities for extending the limits of present-day materials of construction. Each of these metals has attractive proPerties such as good strength at high temperatures and/or corrosion resistance, which make them suitable for use in the fields of chemical equipment, high-temperature jet engines, rocket motors, high math number airframes, and missiles, and other specialized applications. Less Common Met&. E. M. Sherwood. IndusCial and Eagineeving Chemistry, v. 50, Sept. 1958, p. 2, p. 1455-x459. Reactive metals can be made more resistant
409
Air-Lubricated Bearings for HighSpeed Motors and Turbines. (in Russian) S. A. Sheinberg and A. M. Kharitonov. Vestnik Mashinostroeniirs, v. 38, no. 9, Sept. 1958. p. r4-17. Description of a high-speed motor with airlubricated bearings successfully tested in laboratory and industrial conditions, in the latter as an internal grinding head. The head assures high-quality grinding and high efficiency. Design and manufacturing details. 4~2,
Gears and Seals
The Casting and Heat Treating of Steel Gears. J. M. Calkins and Victor E. Zang. M&Z Treating, v. 9, no. 5, Sept.-&t. 1958, p. IZ + I page. The choice of material and type of heat treatment to be used in the processing of cast steel gears depends largely on the ultimate use of the gear and the allowable cost of the part. Recent Research on Hydraulic Seals. I). F. Denny. Scientific Lubricalion, Y. IO, Sept. 1958, p. 12-17. A consideration of the problems of sealing in the lubrication of bearings of turbine shafts.
WEARRESISTANCE
to high temperature oxidation by alloying and the development of impervious, welibonded protective surface coatings. The best progress has been made in protective coatings for MO. The most promising work with Nb has been based on alloying. Special alloys of Zr, Ta, and Nb have been developed for the somewhat unusual corrosive and other inimical conditions prevalent in nuclear reactors. The Wear of Metals. J. F. Archard. Scientific Lubrication, Y. IO, Nov. 1958. p. 16-21. General explanation of wear phenomena. USC of radioactive tracers, Relations between wear rate and load. Plastics for Nose Cones. Irving Gruntfest. SAE JournaZ. v. 66, Nov. 1958. P. F-73. Plastics for nose cones and other parts of hypersonic vehicles are feasible because plastics decompose slowly. In this respect organic plastics may be more advantageous than metals. Investigation of Ceramic Materials in a Laboratory Rocket Motor. J. F. Lynch, J. F. Quirk, and W. H. Duckworth. American Ceramic Society Bulletin. v. 37, Oct. r95g, P. 443-445. Thirty-four different ceramic materials were