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

Item

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