The controversy about the relation between the flow stress τ and the screw dislocation density Ns, at large values of Ns in NaCl is clarified. Using both etch pit and electron transmission techniques a relation of the type {article}{empty}{document}τ ~ √ Nₛ{document} is confirmed as has also been found for low Ns values. The origin of dislocation dipoles observed in transmission is discussed.
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Hesse et al. (1972) studied this question.
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