Issue |
J. Phys. IV France
Volume 134, August 2006
EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
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Page(s) | 157 - 162 | |
DOI | https://doi.org/10.1051/jp4:2006134024 | |
Published online | 26 July 2006 |
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 157-162
DOI: 10.1051/jp4:2006134024
Scalling effects on the deformation behaviour of W/Cu composite materials under dynamic loading
E. El-Magd, M. Korthäuer and S. AtayaDepartment of Material Science (LFW), Aachen University (RWTH), Augustinerbach 4, 52062 Aachen, Germany
Published online: 26 July 2006
Abstract
Tungsten/copper (W/Cu) particle composites were used to
investigate the scaling effects on their deformation and fracture behaviour.
The effects of the volume fraction and the particle size of the
reinforcement (tungsten particles) were studied. W/Cu-80/20, 70/30 and 60/40
wt.% each with tungsten particle size of 10 and 30 m were tested
under compression loading up to high strain rates. Cylindrical compression
specimens with different volumes (D
were investigated with
strain rates between 0.001s - 1 and 6000 s - 1 at temperatures
from 20°C to 800°C. A clear dependence of the flow stress on the
deformed volume of the specimens was shown for compression loading.
An extensive metallographic investigation was carried out to determine a
correlation between the deformation of the tungsten particles and the global
deformation of the specimen. The contribution of the hard phase in the
deformation process has shown to have an effective influence in the
deformation process. The size of the deformed zone under compression loading
showed an effect on the failure mechanism.
The material behaviour of the different W/Cu composites was described with
material laws. The parameters of the material law were presented as a
function of the strain rate, temperature, the volume fraction and the
particle size of the tungsten. The mechanical behaviour of the composite
materials was numerically computed with the previously determined material
laws.
© EDP Sciences 2006