Aging study of 2024 aluminum by dynamic modulus techniques /
G.W. King.

Description

Main Author

King, G. W.

Related Names

United States. Air Force.

Language(s)

English

Published

Wright-Patterson Air Force Base, Ohio : Directorate of Materials and Processes, Aeronautical Systems Division, Air Force Systems Command, United States Air Force, 1962.

Subjects

Aluminum alloys > Aluminum alloys / Elastic properties.
Aluminum alloys > Aluminum alloys / Vibration.
Aluminum-copper alloys.

Summary

Dynamic modulus measurements are used to study precipitation rates in 2024 Al alloy. The results are discussed in terms of the effect of structural changes on the elastic modulus as well as the kinetics of precipitation at various stages of the age-hardening process. Activation energies were determined for aging in the temperature ranges from room (77 F) to 130 F, and 375 F to 425 F. A value of 20.7 kcal/gm mole was obtained for the lower temperature range, and 23 kcal/gm mole for the higher temperatures. The data indicate that modulus changes are primarily influenced by the structure of the second phase, however, some evidence of strain energy effects are indicated. (Author)

Note

"November 1962."

Physical Description

16 pages : illustrations, tables ; 28 cm.

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