INTERNAL FRICTION OF DEFORMED NaCL
نویسندگان
چکیده
Internal friction of deformed oriented NaCl single crystals has been measured as a function of flow stress, strain amplitude, frequency, temperature and divalent doping. In pure NaCl af er deformation a maximum of internal friction PI is observed at low temperatures. With increasing 1+ Sr doping a second but much weaker peak P2 appears at higher temperatures. The dependencies of PI on the parameters used are typical for a Bordoni-relaxation. The Peierls stress estimated for slip on the (110)<110> system compares well with that obtained from yield stress measurements. P2 is due to impurity-dislocation interaction.
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