Numéro |
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) | 1035 - 1040 | |
DOI | https://doi.org/10.1051/jp4:2006134158 | |
Publié en ligne | 26 juillet 2006 |
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 1035-1040
DOI: 10.1051/jp4:2006134158
Viscoplastic behavior of pure shocked iron
C. Voltz and F. BuyCommissariat à l'Énergie Atomique, Centre de Valduc, 21120 Is-sur-Tille, France
Published online: 26 July 2006
Abstract
This paper proposes an analysis of shock wave effects established on
dislocations mechanism for high purity iron. Pure iron is known to
exhibit to
(body-centered cubic to
hexagonal close packed) phase transition when shocked to pressure
above 13 GPa. This pressure induced a solid-solid completely
reversible transformation. Material was submitted to shock wave,
through plate impact tests, in the range of 4 GPa to 39 GPa. Post
shock recovered iron, which undergoes
to
and return transition, cumulates strain-hardening, micro structural
defects caused by imposed pressure and shear. The mechanical
response to shock of pure iron is reviewed in this paper regarding
to shock pressure. We use a formalism based on physical relations to
describe stress strain curves, taking into account the dislocation
density.
© EDP Sciences 2006