Title

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

Date

1966

Index Abstract

Not Available

Photo Quality

Not Needed

Report Number

AFML TR 65-56 Part 2

Creator

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

Extent

82

Identifier

AD0802089

Access Rights

Export Control

Distribution Classification

1

Contract

AF 33(657)-8324

DoD Project

7360

DoD Task

736002

DTIC Record Exists

No

Distribution Change Authority Correspondence

USAFML LTR

Abstract

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.

Report Availability

Full text available

Date Issued

1966-06

Provenance

Lockheed Martin Missiles & Fire Control

Special Scanning Requirements

Due to a printing error, pages 6, 7, 66 & 67 are blank

Type

report

Format

1 online resource