J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 1047-1051
Dynamic materials behavior of a porous pressureless sintered steel and a HIPped steelH. Nahme1, E. Lach2 and R. Rohr1
1 Fraunhofer-Institut für Kurzzeitdynamik, EMI, Eckerstr. 4, 79104 Freiburg, Germany
2 French-German Research Institut of Saint-Louis, ISL, 5 rue du Général Cassagnou, 68301 Saint-Louis, France
Published online: 26 July 2006
Dampening of shock waves is of interest in many applications. The material studied is a low carbon steel alloy as it is usually used for sintered automotive parts. The low carbon steel alloy was in the initial state pressure less sintered with a density of about 83% of the theoretical density. Some specimens had been hot isostatically pressed (HIPped) at 1050 bar and 1120C for 1 h. Dynamic compression tests revealed that no Pochhammer-Cree vibration occured for the porous material whereas strong vibration could be observed for the HIPped steel alloy. Planar plate impact tests had been performed in order to study the influence of the porous microstructure on shock waves. The results show that the shock wave velocity is drastically decreased compared to dense materials. It can be concluded that a microstructure with low porosity and small homogeneously distributed pores is an excellent dampening material for strong shock waves.
© EDP Sciences 2006