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Author Kanel, G. I. ♦ Razorenov, S. V. ♦ Bogatch, A. ♦ Utkin, A. V. ♦ Fortov, V. E. ♦ Grady, D. E.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ ALUMINIUM ♦ FRACTURE PROPERTIES ♦ MAGNESIUM ♦ TENSILE PROPERTIES ♦ SHOCK WAVES ♦ TEMPERATURE DEPENDENCE ♦ VERY HIGH PRESSURE ♦ PRESSURE DEPENDENCE ♦ ELASTICITY ♦ HUGONIOTS
Abstract Measurements of the dynamic tensile strength of aluminum and magnesium have been carried out by investigations of the spall phenomena over a wide range of temperatures, shock-wave intensities, and load durations. Free-surface velocity profiles were recorded with VISAR and used to provide the spall strength measurements. The initial temperature of samples was varied from room temperature to near the melting point. The peak compressive pressure in the shock waves was varied from 5 to 50 GPa for aluminum and from 2 to 10 GPa for magnesium. The load duration was varied by more than one order of magnitude. The free-surface velocity measurements showed a precipitous drop in the spall strength of preheated samples as temperatures approached the melting point. No significant influence of the peak pressure on the spall strength was observed. The strain-rate dependencies of the spall strength could be represented as power functions with a power index of 0.060 for aluminum and 0.072 for magnesium. Unexpectedly large amplitudes for the Hugoniot elastic limit of both aluminum and magnesium were observed at temperatures approaching the melting point. {copyright} {ital 1996 American Institute of Physics.}
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-06-01
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 79
Issue Number 11


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