J. Phys. IV France
Volume 110, September 2003
Page(s) 761 - 766

J. Phys. IV France
110 (2003) 761
DOI: 10.1051/jp4:20020785

The influence of temperature, strain rate history and shock preloading in the region of phase transition for armco-iron

A.M. Bragov1, S. Brichikov2, G.T. Gray III2, E. Kozlov2, A.K. Lomunov1, A. Petrovtsev2 and V. Sergeichev1

1  Research Institute of Mechanics, State University of Nizhny Novgorod (RIM-NNSU), 23/6, Gagarin Ave., GSP-1000, 603950 Nizhny Novgorod, Russia
2  Russian Federal Nuclear Center, E.I. Zababakhin Research Institute of Technical Physics (RFNC-VNIITF), 13, Vasil'ev str., 456770 Snezhinsk, Russia

The influence of temperature, strain rate history, and shock-wave prestraining on the mechanical behavior of Armco-iron (Fe) is presented. Shock-wave prestraining of iron above the polymorphic ( $\alpha{-}\varepsilon$ transition is seen to result in significant changes in the stress-strain response of Fe. The increase in the constitutive response of Fe is seen to correspond to an increase in hardness in the preshocked Fe. A high degree of correlation in the experimental results independently obtained in Russia and USA is presented. The observed mechanical property effects in preshocked Fe are correlated to the microstructure evolution in iron following explosive prestraining.

© EDP Sciences 2003