Ultrasonic Studies Of The Nonlinear Properties And Of The Deformation Of Solids. Part II

Download this report (PDF, 1.66 MB, 82 pages)
Report Number: AFML TR 65-56 Part 2
Author(s): Hikata, Akira, Sewell, Frank A., Jr., Chick, Bruce B., Elbaum, Charles
Corporate Author(s): Brown Univ Providence RI Metals Research Lab
Laboratory: Air Force Materials Laboratory
Date of Publication: 1966-06
Pages: 82
Contract: AF 33(657)-8324
DoD Project: 7360
DoD Task: 736002
Identifier: AD0802089

The report covers research on the nonlinear properties of solids, with special emphasis on the role of dislocations in harmonic generation, the effects of plastic deformation and dislocation interactions with point defects. Dislocation breakaway from pinning points was considered as a possible source of harmonic generation; this contribution is of the same sign as that from screw dislocations. Experiments were carried out on aluminum single crystals with several different impurity contents, as measured by electrical resistivity ratios R(300 K)/R(4.2 K) ranging from 270 to 3100. Amplitudes of the third harmonic, as well as the attenuation of the fundamental wave, were measured as a function of bias stress, amplitude of the fundamental wave and amount of plastic deformation. The results of these experiments are consistent with the qualitative predictions of the theory presented.

Provenance: Lockheed Martin Missiles & Fire Control

Other options for obtaining this report:

Via the Defense Technical Information Center (DTIC):
A record for this report, and possibly a pdf download of the report, exists at DTIC

Via National Technical Report Library:
This report may be available for download from NTRL. Use the Title from this record to locate the item in DTIC Online

Indications of Public Availability
No digital image of an index entry indicating public availability is currently available
There has been no verification of an indication of public availability from an inside cover statement