J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 1097-1103
Microstructural evolution in high strength materials at high strain ratesM.N. Bassim1, M. Bolduc2, A.G. Odeshi1 and S. Mirfarkraei1
1 Department of Mechanical Engineering, University of Manitoba, Winnipeg, MB, Canada
2 Department of National Defence, Defence Research Establishment, Val Cartier, QB, Canada
Published online: 26 July 2006
High strength materials such as used as armor plate have been investigated in torsion using Split Hopkinson Bars for the purpose of obtaining stress-strain curves and for examining the mechanism of plastic deformation in terms of mechanical instability due to thermal softening at high strain rates. A comparative study of the plastic deformation behavior of RHA steel, Aluminum 5083 H131 alloy and Tungsten A90S alloy under the loading condition at high strain rates is carried out and the effect of strain rate on shear flow stress and stress-strain profiles is presented. Strain rate sensitivities of the materials are evaluated and discussed with respect to mechanical instability and adiabatic shear strain localization.
© EDP Sciences 2006