J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 263-268
Role of the transition on the damage patterns of ironF. Buy1, C. Voltz1, O. Heuzé2 and M. Missonnier2
1 CEA Valduc, 21120 Is-sur-Tille, France
2 CEA DIF, 91260 Bruyères-le-Châtel, France
Published online: 26 July 2006
This paper is a part of the study we lead on the dynamic damage and fracture of iron below and above phase transition. According to the peak pressure level, one can observe some remarkable patterns which have been correlated with the allotropic transformation. In order to explain these different features, a multiphase equation of state has been developed and implemented in the 1D version of the hydrocode Hesione. This equation of state (EoS) is based on Birch formalism for each solid phase and on the thermodynamic equilibrium assumption in the phase transitions. It accounts for complex mechanisms that can occur in the material during the shock-release path such as shock splitting, release shock wave... The numerical results we get with such an EoS explain the different damage patterns observed on recovered samples
© EDP Sciences 2006