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Dynamic Behavior of Fully Dense Molybdenum [Book Chapter]

Conference · · Shock Compression of Condensed Matter–1991
 [1];  [1];  [2];  [3]
  1. Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
  2. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  3. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
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We have performed a series of dynamic impact tests on molybdenum to determine its high-pressure yield and viscoelastic properties. Nine experiments, performed with a compressed gas gun and VISAR diagnostics, produced a variety of combinations of shocks, reshocks and releases. Pressure ranges from 6.5 to 15 GPa were investigated, and specimen thicknesses ranged from 6 to 13 mm. The Hugoniot elastic limit appears to be independent of sample thickness and final stress levels over the ranges reported in this study. Strengths at the HEL and the Hugoniot state, approximately 1.3 GPa, are within the range observed for lower strain rates of 10-3 sec-1 to 5·103 sec-1. As with other metals, release waves do not show clean elastic-plastic behavior. Lagrangian sound velocities for singly shocked states are 6.30 to 7.40 km/sec over the pressure range tested. Strain rate behaves as approximately as the fourth power of stress, although it appears to decrease with propagation distance over the specimen thickness range used.
Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC04-76DP00789
OSTI ID:
5533390
Report Number(s):
SAND--91-0081C; CONF-9107105--44; ON: DE91014902; ISBN: 978-0-444-89732-9
Conference Information:
Journal Name: Shock Compression of Condensed Matter–1991
Country of Publication:
United States
Language:
English

References (3)

Isothermal compression of bcc transition metals to 100 kbar journal January 1978
Survey of diagnostic tools used in hypervelocity impact studies journal January 1987
Laser interferometer for measuring high velocities of any reflecting surface journal November 1972

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Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
360104 -- Metals & Alloys-- Physical Properties
DIMENSIONS
ELASTICITY
ELEMENTS
IMPACT TESTS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
METALS
MOLYBDENUM
STRAIN RATE
TENSILE PROPERTIES
TESTING
THICKNESS
TRANSITION ELEMENTS
YIELD STRENGTH