Abstract
The influence of various orientations and configurations of an electric field on the flow and fracture stresses in compression of cast polycrystalline NaCl was determined at room temperature. An electric field of }0.1 MV/m reduced the flow and fracture stresses by }50%, relatively independent of the orientation of the field. This field is one to two orders of magnitude lower than those previously reported to enhance {110} (110) dislocation motion in NaCl single crystals. It is concluded that in the present tests on polycrystals the electric field enhanced cross slip. Several mechanisms by which this might occur are proposed.
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