Influence of an electric field on the plastic deformation of polycrystalline NaCl at elevated temperatures

✍ Scribed by Di Yang; H Conrad

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 256 KB
• Volume: 46
• Category: Article
• ISSN: 1359-6454
• DOI: 10.1016/s1359-6454(97)00431-x

✦ Synopsis

AbstractÐThe eect of a d.c. electric ®eld of 1 kV/cm on the plastic deformation of polycrystalline 99.9% NaCl was determined in compression at 23±5328C (0.28±0.75 T M ) and strain rate e Ç =8.3 Â 10 À4 s À1 . Upon removing the eect of Joule heating it was found that the reduction in the ¯ow stress produced by the ®eld increased with temperature from 0.28 to 0.4 T M , reached a maximum at 0.4 T M and then decreased, becoming nil at 0.75 T M . It is proposed that the reduction in ¯ow stress resulted from an enhancement of cross-slip due to an increase in stacking fault energy. The ®eld had no detectable eect on the plastic deformation kinetics at constant structure in the temperature range 0.28±0.6 T M (cutting of forest dislocations), nor did it appear to have a signi®cant in¯uence on dislocation glide and climb at 0.