Author(s)

A. Bussiba, H. Alush, M. Kupiec and Y. Katz

Abstract

Generally, deformation mode by adiabatic shear is associated with applied high deformation rates. In this context, some clarifications are invoked on at least two levels. First, on the level of critical events regarding the competitive nature between the soft localized shear and micro-cracking onset. Second, on the essential distinction between remote strain rate in contrast to local one. As such, localized behavior might depend on the discrete crystal plasticity, microstructure and on deformation mechanisms. The current study in iron base, tungsten and uranium alloys was aimed toward two fold objectives, (i) To demonstrate the role of complex micro- structures on strain rate response, (ii) To emphasize the loading state effects. The study was mainly conducted by utilizing uni-axial compressive specimens in strain-rate values up to 100 sec"*

Keywords