Shear strength of shock-loaded polycrystalline tungsten

Journal Article · Mon Sep 01 00:00:00 EDT 1980 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.328309· OSTI ID:5054048

Asay, J R; Chhabildas, L C; Dandekar, D P

Previous experiments have suggested that tungsten undergoes a significant loss of shear strength when shock loaded to stresses greater than 7 GPa. In order to investigate this effect in more detail, a series of experiments was conducted in which polycrystalline tungsten was first shock loaded to approximately 10 GPa and then either unloaded or reloaded from the shocked state. Analysis of measured time-resolved wave profiles indicates that during initial compression to 9.7 GPa, the shear stress in polycrystalline tungsten increases to a maximum value of 1.1 GPA near a longitudinal stress of 5 GPa, but decreases to a final value of 0.8 GPa for stresses approaching 10 GPa. During reloading from a longitudinal stress of 9.7 GPa to a final value of approx.14 GPa, the shear stress increases to a peak value of 1.2 GPa and softens to 1.0 GPa in the final state. During unloading from the shocked state, the initial response is elastic with a strong Baushinger effect. Examination of a recovered sample shows evidence for both deformation slipping and twinning, which may be responsible for the observed softening.

• Research Organization: Sandia Laboratories, Albuquerque, New Mexico 87185
• DOE Contract Number: DE-AC04-76-DP00789
• OSTI ID: 5054048
• Journal Information: J. Appl. Phys.; (United States), Vol. 51:9
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
TUNGSTEN
SHEAR PROPERTIES
SHOCK WAVES
COMPRESSION
DATA
ELASTICITY
POLYCRYSTALS
SLIP
TIME RESOLUTION
TWINNING
VERY HIGH PRESSURE
CRYSTALS
ELEMENTS
INFORMATION
MECHANICAL PROPERTIES
METALS
REFRACTORY METALS
RESOLUTION
TENSILE PROPERTIES
TIMING PROPERTIES
TRANSITION ELEMENTS
360103* - Metals & Alloys- Mechanical Properties