Effect of Overheating on Creep-rupture Properties of HS-31 Alloy at 1,500 Degrees F
Effect of Overheating on Creep-rupture Properties of HS-31 Alloy at 1,500 Degrees F

Author: John Paul Rowe

Publisher:

Published: 1957

Total Pages: 702

ISBN-13:

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An investigation of overheating HS-31 alloy to temperatures of 1,650 degrees, 1,800 degrees, 1,900 degrees, and 2,000 degrees F during the course of rupture tests 1,500 degrees F was carried out. The overheating was applied periodically for 2 minutes in most of the tests. The intent was to develop basic information on the effect of overheats on creep- rapture properties in order to assist in the evaluation of damage from overheats during gas- turbine operation.

A Flight Evaluation and Analysis of the Effect of Icing Conditions on the ZPG-2 Airship
A Flight Evaluation and Analysis of the Effect of Icing Conditions on the ZPG-2 Airship

Author: William Lewis

Publisher:

Published: 1958

Total Pages: 648

ISBN-13:

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A series of test flights was conducted by the U. S. Navy over a 3-year period to evaluate the effects of icing on the operation of the ZFG-2 airship. In supercooled clouds, ice formed only on the forward edges of small protuberances and wires and presented no serious hazard to operation. Ice secretions of the glaze type which occurred in conditions described as freezing drizzle adversely affected various components to a somewhat greater extent. The results indicated a need for protection of certain components such as antennas, propellers, ad certain parts of the control system.

The Physical Metallurgy of Cobalt-base Superalloys
The Physical Metallurgy of Cobalt-base Superalloys

Author: H J Wagner

Publisher:

Published: 1962

Total Pages: 102

ISBN-13:

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A detailed picture is presented of the physical and chemical phenomena that affect the behavior of cobalt-base superalloys. Solid-solution strengthening is obtained from the high-melting metallic elements molybdenum, tungsten, tantalum, and columbium. These elements also participate in precipitation reactions involving their carbides. Precipitation of intermetallic compounds such as Ni3Ti is an important process in cobalt alloys containing appreciable amounts of nickel and titanium. The relationships among microstructure, heat treatment, and mechanical properties of the important commercial alloys are considered, and whenever possible, explained on the basis of the physical and chem cal processes that occur. (Author).