The effects of heat-treating and testing environments on the properties of refractory metals /
by F. F. Schmidt, D. J. Maykuth, and H. R. Ogden to Office of the Director of Defense Research and Engineering.

Description

Main Author

Schmidt, F. F.

Related Names

Ogden, H. R., author.
Maykuth, D. J., author.
Defense Metals Information Center (U.S.)

Language(s)

English

Published

Columbus, Ohio : Defense Metals Information Center, Battelle Memorial Institute, 1964.

Subjects

Heat resistant alloys.
Metals > Metals / Heat treatment.

Summary

Studies on the effects of heat-treating and testing environments for the refractory metals have been limited primarily to the unalloyed metals and a few alloys of columbium and molybdenum. Most of this work has relied on compositional changes as a means of assesing the effects of various environments on these materials. It has been shown that all of these materials are subject to contamination or purification in various test environments. The residual gases H2, CO(or N2), and H20, constitute the major sources of contamination when testing columbium and tantalum materials in vacua. Under the same conditions, molybdenum and molybdenum alloys containing carbon and reactive-metal additions are subject to serious decarburization. Nonreactive gaseous atmospheres also cause serious changes in material chemistry, since small quantities of noxious gases are contained in the atmosphere. Several promising methods of circumventing material chemistry changes during various longtime, high-temperature exposures are being used and/or evaluated. (Author).

Note

Research supported by the Technology Division, Wright-Patterson Air Force Base, Ohio.
"August 20, 1964."

Physical Description

1 volume (various pagings) : illustrations ; 28 cm.

Locate a Print Version

Find in a library

Viewability