J. Phys. III France
Volume 3, Numéro 8, August 1993
Page(s) 1563 - 1579
DOI: 10.1051/jp3:1993215
J. Phys. III France 3 (1993) 1563-1579

Mechanisms of rotational effect in shock-loaded crystalline metallic materials

M. Yu. Gutkin, I. A. Ovid'ko and Yu. I. Meshcheryakov

Institute of Machine Science Problems, Russian Academy of Sciences, Bolshoj 61, Vasil. Ostrov, St. Petersburg 199178, Russia

(Received 11 May 1992, revised and accepted 3 June 1993)

Physical models are proposed which describe the rotational effect (formation of local rotated regions) in crystalline metallic materials at some regimes of schock-wave loading. The suggested models treat the rotational effect as being related to a crystal-to-glass-to-crystal transformation induced by an interaction of a shock-wave front with the local stress fields of dislocation pile-ups. In doing so, several variants of the evolution of defect structures in shockloaded metallic materials are examined which depend on shock-wave parameters. In particular, the formation of shear bands and microcracks both located within and near boundaries of the rotated regions are considered in detail.

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