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Title: Spall fracture properties of aluminum and magnesium at high temperatures

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.}

Authors:
; ; ; ;  [1];  [2]
  1. High Energy Density Research Center of the Russian Academy of Sciences, IVTAN, Izhorskaya 13/19, Moscow 127412, Russia, CIS (Russian Federation)
  2. Sandia National Laboratories, Albuquerque, New Mexico 87185-0821 (United States)
Publication Date:
OSTI Identifier:
286063
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 79; Journal Issue: 11; Other Information: PBD: Jun 1996
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM; FRACTURE PROPERTIES; MAGNESIUM; TENSILE PROPERTIES; SHOCK WAVES; TEMPERATURE DEPENDENCE; VERY HIGH PRESSURE; PRESSURE DEPENDENCE; ELASTICITY; HUGONIOTS

Citation Formats

Kanel, G I, Razorenov, S V, Bogatch, A, Utkin, A V, Fortov, V E, and Grady, D E. Spall fracture properties of aluminum and magnesium at high temperatures. United States: N. p., 1996. Web. doi:10.1063/1.362542.
Kanel, G I, Razorenov, S V, Bogatch, A, Utkin, A V, Fortov, V E, & Grady, D E. Spall fracture properties of aluminum and magnesium at high temperatures. United States. doi:10.1063/1.362542.
Kanel, G I, Razorenov, S V, Bogatch, A, Utkin, A V, Fortov, V E, and Grady, D E. Sat . "Spall fracture properties of aluminum and magnesium at high temperatures". United States. doi:10.1063/1.362542.
@article{osti_286063,
title = {Spall fracture properties of aluminum and magnesium at high temperatures},
author = {Kanel, G I and Razorenov, S V and Bogatch, A and Utkin, A V and Fortov, V E and Grady, D E},
abstractNote = {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.}},
doi = {10.1063/1.362542},
journal = {Journal of Applied Physics},
number = 11,
volume = 79,
place = {United States},
year = {1996},
month = {6}
}