The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

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

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

Download this report

(PDF, 1.66 MB, 82 pages)

Other options for obtaining this report

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

Via National Technical Information Service:
This report may have been digitized and made freely available for public download, or made publicly available for purchase by the National Technical Information Service through their online database, the National Technical Reports Library

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