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Active measurements of defect processes in shock compressed metals and other solids [electronic resource].

Published
Albuquerque, N.M. : Sandia National Laboratories, 1980.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: 13 : digital, PDF file
Additional Creators
Sandia National Laboratories and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Solid samples have been routinely recovered for examination after having been subjected to high pressure shock loading. Such investigations have revealed many unique and interesting defect features and are essential if a detailed understanding of shock deformation processes is to be achieved. Nevertheless, examination of samples hours or days after they are compressed for only a few microseconds in a loading whose rise time may be subnanosecond fails to address the relationship between the residual defect structure and that existing during the loading. Electrical probes, and to a lesser extent optical probes, have provided reasonably direct measurements of defect states and some limited information on the evolution of these states. For example, measurements of the electrical resistance of metals provide an indication of vacancy concentrations. Similarly, measurements of shock-induced electrical polarization in insulating solids have provided evidence that large numbers of point defects are generated and displaced by the stress and velocity gradients within the shock fronts. Optical measurements of shock-induced bleaching of color centers in NaCl have provided some evidence for kinetics of the formation of higher-order point defects. This paper reviews the status of active measurements which have provided information about shock-induced changes in the defect state of solids.
Report Numbers
E 1.99:sand-80-1945c
E 1.99: conf-800641-8
conf-800641-8
sand-80-1945c
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Note
Published through SciTech Connect.
01/01/1980.
"sand-80-1945c"
" conf-800641-8"
International conference on the metallurgical effects of high strain rate deformation and fabrication, Albuquerque, NM, USA, 22 Jun 1980.
Graham, R.A.
Funding Information
AC04-76DP00789
View MARC record | catkey: 14460105